How do I calculate X% of Y?

Multiply X by Y and divide by 100. For example, 20% of 50 = 10.

How do I calculate percentage increase?

Subtract old from new, divide by old, multiply by 100.

Calculate percentages and percentage changes effortlessly. What is X% of Y? What is the percentage change from A to B?

**Percentage Calculator Types:**

1. **What is X% of Y?**: Find percentage of a number

2. **X is what % of Y?**: Find what percentage X is of Y

3. **% change**: Find increase/decrease percentage

4. **X is Y% of what**: Find the whole from percentage

**Common Calculations:**

- Discounts and sales

- Tip calculations

- Grade scores

- Growth/changes

**Examples:**

- 20% of 50 = 10

- 5 is 10% of 50

- Change from 50 to 75 = 50% increase