A Percentage Calculator helps you quickly find the percentage of a number, calculate what percent one number is of another, or determine the original amount before a percentage increase or decrease. It’s useful for finance, discounts, statistics, and everyday math.
Common Formulas:
- To calculate X% of Y: Result=X100×Y\text{Result} = \frac{X}{100} \times YResult=100X×Y
- To find what percent X is of Y: Percentage=(XY)×100\text{Percentage} = \left(\frac{X}{Y}\right) \times 100Percentage=(YX)×100
- To find the original number before a percentage increase/decrease:
- After increase: Original=New Value1+(Percentage/100)\text{Original} = \frac{\text{New Value}}{1 + (\text{Percentage}/100)}Original=1+(Percentage/100)New Value
- After decrease: Original=New Value1−(Percentage/100)\text{Original} = \frac{\text{New Value}}{1 – (\text{Percentage}/100)}Original=1−(Percentage/100)New Value