Frequently Asked Questions
How do I calculate percentage increase?
Percentage increase = (new value - old value) / old value x 100. For example, going from 100 to 130 is a 30% increase.
How do I find what percent A is of B?
Divide A by B and multiply by 100. For example, 30 is 15% of 200 because 30/200 x 100 = 15%.
How do I calculate a discounted price?
Multiply the original price by (1 - discount/100). For example, 20% off $50 is $50 x 0.80 = $40.
Verified 2026 formulas