# Percentages

### Simple percentages of amounts

Find simple (50%, 25%, 10%, 5%, 1%) percentages of amounts.

### Percentage of amounts

Find percentages of amounts.

### Percentage increase

Increase a quantity by a given percentage.

### Percentage decrease

Decrease a quantity by a given percentage.

### Percentage increase and decrease

Increase and decrease a quantity by a given percentage.

### Reverse percentage increase

Find a quantity before increase.

### Reverse percentage decrease

Find a quantity before decrease.

### Reverse percentage change

Find a quantity before an increase/decrease.

### Mixed percentage change

A combination of percentage increase/decrease and reverse percentage problems.

### Compound interest

Repeated percentage increase problems.

### Reverse compound interest

Reverse repeated percentage increase problems.