Percent Calculation

1. Select the "Percentage formula" you want to calculate.
2. Enter the values ​​needed for the calculation: "Number a", "Total (b)", and "Percentage (x)".
3. The "Percentage calculation result value" will be calculated automatically.

Percent (%) is a unit of measurement that indicates how much of a whole something is, and it means "how many out of 100". It comes from the Latin word "per centum" (per 100), and in Japanese it is a combination of "per" and "cent".

1 percent (1%) means 1/100 of the whole. In other words, 1/100 is 1%.

50 percent (50%) means half of the whole. This is equivalent to 50/100 of the total.

Find the percentage of a number

• Formula: a × (x / 100)
• Example: 20% of 100 is 20

Find the percentage of a number

• Formula: (a / b) × 100
• Example: 40 out of 200 is 20%

Calculate the whole from a certain percentage

• Formula: a / (x / 100)
• Example: If 10 is 10% of the whole, the whole value is 100

What happens when a number increases by a certain percentage

• Formula: a × (1 + (x / 100))
• Example: If 100 increases by 10%, it becomes 110

What happens when a number decreases by a certain percentage

• Formula: a × (1 - (x / 100))
• Example: If 100 decreases by 10%, it becomes 90

This tool is available for free.