Question 1

How do I calculate X% of a number?

Accepted Answer

Multiply the number (Y) by the percentage (X) as a decimal. For example, 25% of 200 is 200 × 0.25 = 50.

Question 2

What percentage is X of Y?

Accepted Answer

Divide X by Y and multiply the result by 100. For example, 30 is 20% of 150 because (30 ÷ 150) × 100 = 20%.

Question 3

How do I calculate percentage increase or decrease?

Accepted Answer

Subtract the old value from the new value, divide by the original value, then multiply by 100. A positive result is an increase, a negative result is a decrease.

Question 4

What is 5% of 50?

Accepted Answer

5% of 50 is 2.5. To calculate this, multiply 50 by 0.05 (5% as a decimal).

Question 5

What is 25% of 200?

Accepted Answer

25% of 200 is 50. To calculate this, multiply 200 by 0.25 (25% as a decimal).

Question 6

30 is what percent of 150?

Accepted Answer

30 is 20% of 150. To calculate this, divide 30 by 150 and multiply by 100.

Question 7

What is the percentage increase from 40 to 50?

Accepted Answer

The percentage increase from 40 to 50 is 25%. To calculate this, subtract 40 from 50, divide by 40, and multiply by 100.

Percentage Calculator

What is X% of Y?

X is what % of Y?

Percentage Change

A tiny tool for figuring out percentages.

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How it works

Use it when:

1. How to Calculate X% of a Number

2. How to Work Out What % One Number Is of Another

3. How to Calculate Percentage Increase or Decrease