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I need to estimate car loans using this calculator but i don't know how to set up the problem for 12 payments a year. The information is 36 installment loan for 15,000 at 10 percent. SO N being 36 I/Y being 10 and PV being 15,000

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Posted on Dec 28, 2009

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If I know how much the payment is and the length of the loan how can I calculate the percentage I am paying?

A=P((1-(1+r)^(-n))/r, where A is the present value of the annuity, or the amount of the loan, P is the periodic payment, r is the interest rate per period, and n is the number of periods. In this case, I assume the payments are monthly, so n would be 36. You mentioned that you already have A and P. However, solving for r algebraically is not that easy because it is in two places on the right hand side. However, you can make a table and put in interest rates to make both sides equal. Remember to multiply this answer by 12 to get the annual interest rate.

For example, if the payment is $100, and the amount of the loan is $2,766.07, and the number of periods is 36, what is the interest rate.

r Calculate Actual Difference
0.010 3010.75 2766.07 -244.68
0.011 2959.42 2766.07 -193.35
0.012 2909.33 2766.07 -143.26
0.013 2860.42 2766.07 -94.35
0.014 2812.68 2766.07 -46.61
0.015 2766.07 2766.07 0.00
0.016 2720.55 2766.07 45.52
0.017 2676.11 2766.07 89.96

You can see from the chart that the value of r of 0.015 makes the difference 0, so the periodic interest rate is 0.015 or 1.5%. We need to annualize this by multiplying by 12 and we get an annual interest rate of 18%.

Good luck,


Annuity Payment PV

Aug 15, 2016 | Office Equipment & Supplies

1 Answer

What is 7% of $44000.00?

7% of $44000.00 is $3,080.00.
That's how much the interest would be the first year if you don't make any payments. The total amount of interest you pay depends on the length of the loan. For a 30-year loan, your total payments would be $105,389.92. For a 20-year loan, your total payments would be $81,871.57.

Sep 12, 2014 | Office Equipment & Supplies

1 Answer

How to calculate npv

Hi there,

To calculate present value you need to type in all the other missing values and then press COMP and PV.
For example: if the future value is R5000, the interest is 12% p.a. compounded monthly and it paid over 3 years.
Type in 5000 and press FV
type in 12 and I/Y
Press 2nd F and I/Y and make sure P/Y says 12 (for 12 payments per year).
Press ON
press 3 press 2nd F N and then press N again (for 36 payments in total). Make sure your screen says ANS -> N otherwise the calculation will not work.
Now if if your payments are 0 (in other words you are not making monthly payments) then press 0 and PMT,
Otherwise, if you are making monthly payments for e.g. R200 a month, type in +/- 200 PMT.
Now calculate your original amount by pressing COMP PV.
If you made no payments your original amount should be -3494.62
And if you chose to add payments your original amount should be
2 526.88.

May 30, 2014 | Sharp EL-738 Scientific Calculator

1 Answer

How do i calculate interest on a R20000.00 loan at 13% for 5 years on teh sharp el738f calculator

Hi there,

First make sure all previous amounts stored are cleared by pressing 2nd F MODE.
Then type in the original value 20 000 and press PV.
Type in the interest 13 and press I/Y.
(If i assume that the interest is compounded yearly my calculation is more simple)
press 5 and N
Press COMP FV and your answer will be - 36 848.70

(If I assume that the interest is compounded monthly, i need to input a little bit more data into my calculator)
Press 2nd F I/Y (to get to payments per year) and press 12 and ENT. Press ON.
Then press 5 and 2nd F N and then press N again.
Now calculate FV by pressing COMP FV which should give you - 38 177.13.

Take this value and subtract the PV from it to get the amount of interest earned.

May 16, 2014 | Sharp EL-738 Scientific Calculator

3 Answers

How do I calculate a mortgage payment?

If $100,000.00 loan: enter 100000. in pv, if interest rate is 5%, enter 5 divided by 12 = %i if 30 year mortgage, enter 360 N enter 2nd PMT to get monthly principle and interest. You may have already solved this problem.

Aug 19, 2010 | Texas Instruments BA Real Estate...

2 Answers

Borrowed 18ooo-repay loan equal monthly payments in the next 5 much are monthly payments if interest is 5.5% compounede monthly-how much will pay in interest over the term of loan-how do i set...

Once you're in the TVM solver:
On the top line (N=) type in 5 * 12 ENTER for five years of month payments.
On the I% lline type in 5.5 / 12 ENTER for the month interest rate.
On the PV line type in 18000 ENTER
Make sure the FV is 0 and END is highlighted on the bottom line.
Move the cursor to the PMT line and press ALPHA [SOLVE] (that's ALPHA ENTER) and see -343.82 for the monthly payment.

Jan 17, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

My BAII isnt calculating correctly

Change the payments-per-year to 1 to get the correct answer. Press 2nd [P/Y] 1 ENTER.

To pay off a loan of $3245 at 12% annual interest, you can either make 6 monthly payments of $559.91 and pay it off in half a year or make 6 annual payments of $789.27 and pay it off in six years.

Jan 15, 2009 | Texas Instruments BA-II Plus Calculator

2 Answers

Loan Balance

set your p/y to 12( compounding periods per year). I think you are calculating for a one year loan?

Nov 18, 2008 | Texas Instruments BA-II Plus Calculator

4 Answers

Simple loan payment

Are you putting 30x12=360 for N? Since you have monthly payments, you have to compute it a little different. Also, you have to find the effective monthly interest rate. 1.0575^(1/12) = .4669839%.

Another way is to enter 30 for N and 5.57 for I/Y, and change P/Y to 12.

Hope this helps!

Apr 08, 2008 | Texas Instruments BA-II Plus Calculator

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