Question 1

How do I calculate a percentage of a number?

Accepted Answer

Multiply the number by the percentage divided by 100. For example, 20% of 200 = 200 x (20/100) = 40.

Question 2

How do I calculate percentage change?

Accepted Answer

Percentage change = ((New Value - Original Value) / Original Value) x 100. A positive result means an increase, negative means a decrease.

Question 3

How do I find what percent one number is of another?

Accepted Answer

Divide the first number by the second number and multiply by 100. For example, 30 is what percent of 200? (30/200) x 100 = 15%.