Percent Calculator

Enter 15 for 15%. Not needed when asking "what percent".
The 100% reference amount.
The portion of the whole. Not needed when taking a percent of a number.
The percentage the table starts at.
The percentage the table runs up to (inclusive).
How far apart the rows are, in percentage points.
Answer
30
Percentage Calculator
Part
30
Whole
200
Percentage
15 %
Percent as a decimal
0.15
Percent as a fraction
3/20
Formula used
part = (percent / 100) x whole
Worked out from National Institute of Standards and Technology, SI Guide (NIST SP 811) ยง7.10.2 on percent as the number 0.01 and 1 other source.

How this is worked out

2 steps
  1. Write the percent as a decimal: 15% / 100 = 0.15
  2. Multiply by the whole: 0.15 x 200 = 30

Results are general information, not financial, tax, legal, medical or engineering advice.