How do I change from radical form to decimal form

If a result is still displayed in radical format, just press the [S<=>D] key ito convert it to decimal.

If a radical expression is still on the command line, press [SHIFT][=] instead of just [=] to have the result displayed in decimal format.

If you do not want radicals or fractions , set the IO mode to lineIO.
To do so, press [SHIFT][MODE] to access the (SETUP) and select [2:LineIO].