Percentage Calculator

Percent Problems

Solve common percentage questions including percent of a number, percentage share, increase, and decrease.

Understanding Percentages

1. What This Calculator Measures

Percentages express a value as parts per hundred, making comparison and change easier to understand.

2. How the Calculation Works

The selected mode decides whether the calculator finds a portion, a percent share, an increase, or a decrease.

3. Formula or Rule Used

x% of y = y x x / 100.

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