How do I calculate a percentage of a number?

To calculate X% of a number Y, multiply Y by X and divide by 100. For example, 20% of 150 is (150 × 20) / 100 = 30.

How do I calculate percentage increase?

To calculate the percentage increase from A to B, use the formula: ((B - A) / A) × 100. For example, from 100 to 125 is ((125-100)/100) × 100 = 25% increase.

What is the difference between percentage and percentage points?

Percentage change measures relative change (e.g., from 10% to 15% is a 50% increase), while percentage points measure the absolute difference (e.g., from 10% to 15% is 5 percentage points).

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