๐Ÿ’ฏ Percentage Calculator

Type 1: What is X% of Y?

Result

Type 2: X is what % of Y?

Result

Type 3: Percentage Change (Old โ†’ New)

Percentage Change

Type 4: Increase/Decrease by %

Result

How to Calculate Percentage

A percentage is a way of expressing a number as a fraction of 100. The word "percent" comes from the Latin "per centum," meaning "per hundred." Percentages are used in everyday life โ€” from calculating discounts and tax to tracking grades and statistics.

Percentage Formulas

What is X% of Y? โ†’ Result = (X / 100) ร— Y
X is what % of Y? โ†’ Percentage = (X / Y) ร— 100
Percentage Change = ((New โˆ’ Old) / Old) ร— 100
Increase by X% โ†’ New = Original ร— (1 + X/100)
Decrease by X% โ†’ New = Original ร— (1 โˆ’ X/100)

Percentage Examples

  • 25% of 200 = 50 (200 ร— 0.25)
  • 50 is 25% of 200 ((50/200) ร— 100 = 25)
  • 100 to 150 = 50% increase ((150-100)/100 ร— 100)
  • 500 increased by 20% = 600 (500 ร— 1.20)

FAQ โ€“ Percentage Calculator

How do I calculate 20% of a number? โ–ผ
To find 20% of a number, multiply the number by 0.20 (or divide by 5). For example, 20% of 150 = 150 ร— 0.20 = 30. You can also use Type 1 above by entering 20% of 150.
What is the formula for percentage change? โ–ผ
Percentage Change = ((New Value โˆ’ Old Value) รท Old Value) ร— 100. A positive result means an increase; a negative result means a decrease.
How to calculate percentage of marks? โ–ผ
Divide your obtained marks by total marks and multiply by 100. Example: 450 out of 500 = (450/500) ร— 100 = 90%. Use Type 2 above to calculate this instantly.
What is 15% tip on $80? โ–ผ
15% of $80 = 80 ร— 0.15 = $12. So the total would be $80 + $12 = $92. Use our Type 1 calculator above to calculate tips quickly.