Write the hidden denominator
The percent sign means “out of one hundred.” Thus 7.5% is the same quantity as 7.5/100. Dividing gives 0.075. Removing only the sign would leave 7.5, a number one hundred times too large.
Because 7.5% is between 0% and 100%, its decimal 0.075 lies between zero and one. Use that interval to check the placement of the decimal point.
Use the value in the right kind of field
A plain arithmetic expression needs the decimal multiplier: 240 × 0.075 = 18. The Percent of a number tool instead labels its field Percentage (%), so enter 7.5; it performs division by 100 for you.
Converting the rate before typing it into a percentage field applies the conversion twice. When a result seems one hundred times too small, check the field label before changing the formula.
Separate a share from a changed total
The share 18 is 7.5% of 240. If the question asks for an increase, add the share to the original to obtain 258. If it asks only for the part, stop at 18.
Check the reverse conversion: 0.075 × 100 = 7.5. This returns the numerical percentage, after which the % symbol is restored. Keep any rounding separate from this exact place-value conversion.
LET’S WORK IT THROUGH
Find 7.5% of 240.
- Convert the rate: 7.5 ÷ 100 = 0.075.
- Multiply: 240 × 0.075 = 18.
- Check the scale against a fraction of 240.
THE ANSWERThe requested share is 18.
YOUR TURN
A small check for understanding.
Convert the decimal 0.075 back into a percentage.
Reveal the answer
7.5%. Multiply by 100 and restore the percent sign.
Now try your own numbers.
The percent of a number includes input guidance and the limits of its supported calculations. Use it alongside the method above.
Open Percent of a number ↗A note on precision: preserve exact fractions where possible and round numerical results at the end. Found an unclear step? Prepare a correction report.