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How do i calculate ratio - Casio FX83GT Scientific Calculator Calculators

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Unless you are meaning something more specific, ratios are calculated through simple division. For example if there are 2 oranges and 4 apples, the ratio of oranges to apples is 2:4, and the ratio of oranges to the total number of pieces of fruit is 2:6. These ratios can also be expressed in fraction form: there are 2/4 as many oranges as apples, and 2/6 of the pieces of fruit are oranges. If necessary you can perform the calculation 2/4 = 2 therefore there are .5 (half) as many oranges as apples and 2/6 = 0.33333333333333 therefore approximately .333 pieces of fruit are oranges.


On your calculator you should simply need to use the division button to accomplish this.

Posted on Oct 29, 2012

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Posted on Jan 02, 2017

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If you enter the ratios using the fraction entry key ( [a b/c] the results will be displayed as fractions. And when the calculator displays fractions they are always in their reduced form.
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Most of the time a ratio is nothing but the division of two quantities. If you have a fraction key, enter one term of the ratio as numerator, and the second term as denominator. If you do not have a fraction key just use the division key.
According to the name Fraction Mate, you calculator can do fractions. Enter your ratios as you would fractions.

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I just want to know how to do ratios on my calculator


For all practical purposes, ratios involve nothing but the division of one quantity by another. Thus you use the division key. The first cited in a ratio is put in the numerator (dividend), the second named is put in the denominator (the divisor).
2:3 translates as 2/3.

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You don't need a calculator for this. Simply multiply both the numerator and denominator by 2 to get 2/30.

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I have a TI-84 Plus Silver Edition calculator and I need to find the inverse key to get values for sin, cos, tan, csc, sec, cot. I'm past the lesson where you use the 2nd/sin, cos tan to find the...


There are no keys for cosecant, secant, and cotangent. You can calculate those ratios as

csc(x) = 1/sin(x)

sec(x) = 1/cos(x)

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Simply calculate the trig ratio on the right and then take its reciprocal.

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Use the calculator's arc ratios the same way you would in real life.

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The conversion formula is
# dB =10*log(Pout/Pin) for say an amplifier.
For your case
Pout/Pin= 10^4 then #dB =10*log(10^4)=10*4=40 dB

Let us take a less obscure exemple

# dB= 57.39, what is the power ratio?
10*log(Pout/Pin)= 57.39
log(Pout/Pin)=57.39/10=5.739
Pout/Pin=Ratio =10^(5.739)= 548276.9649, not a number you would hear or see quoted, but a correct value.

To calculate the power ratio
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  2. While the number just calculated is still in Answer memory (ANS), press [SHIFT] [LOG] to access the the 10^x function
  3. Press [SHIFT][(-)] to enter (ANS)
  4. Close the parenthesis [)]
  5. Press [ENTER]
Here is the screen capture for the calculation one way and back.

6930c92.jpg

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