Find a percentage of a number
Work out 15% of 200 with the percent key or by dividing by 100.
A percent is a number out of 100. 15% means 15 per hundred, or 0.15. So 15% of 200 is 0.15 × 200 = 30.
Classic Graphing 84
Start on the main screen: Press 2nd then mode (QUIT) to get back to the home screen. Pressing clear on a menu also backs out of it.
This calculator has no percent key on the face. Turn the percent into a fraction of 100: type 15 ÷ 100 × 200.
15÷100×200Press enter.
enter
You should see15/100*200 30
Classic Graphing 84 key reference · Classic Graphing 84 manual
Classic Scientific 30
Start on the main screen: Press 2nd then mode (QUIT) to leave any menu or screen and return to the calculation screen.
Type 200 × 15, then press 2nd and the % key (on the open-bracket key).
200×152nd%(Press enter.
enter
You should see200×15% 30
Classic Scientific 30 key reference · Classic Scientific 30 manual
Natural Scientific 991
Start on the main screen: Press MENU, then 1 (Calculate) to return to the main calculation screen. AC clears the line you are on.
Type 200 × 15, then press SHIFT and the % key (on the open-bracket key).
200×15SHIFT%(Press =.
=
You should see200×15% 30
Natural Scientific 991 key reference · Natural Scientific 991 manual
RPN Scientific 15
Start on the main screen: There is no menu to leave. Press the back arrow to clear a number you are typing, or CLx (g then back arrow) to clear the X register.
Key in the whole amount 200 and press ENTER, then key in the rate 15.
200ENTER15Press g then % (above the yˣ key). The answer is the percentage of the first number.
g%yˣ
You should see30.0000
Tips
- To add 15% to 200, work out 15% first (30), then add it. Or just multiply by 1.15.