Percentage Calculator

How Do You Calculate a Percentage?

To find X% of Y, convert the percentage to a decimal by dividing by 100, then multiply by the number. For example, 25% of 200 = 0.25 × 200 = 50.

How Do You Find What Percent One Number Is of Another?

Divide the part by the whole, then multiply by 100. For example, 30 is what percent of 150? 30 ÷ 150 = 0.2, then 0.2 × 100 = 20%.

How Do You Calculate Percentage Change?

Subtract the original value from the new value, divide by the original value, then multiply by 100. A positive result means increase; negative means decrease. For example, from 80 to 100: (100 - 80) ÷ 80 × 100 = 25% increase.

For more complex problems, try our AI Percentage Calculator or download Solver AI for camera scanning.