Finding percentages of quantities: 10%, 20%, 25% and 50%

50% is half, so if you want to find 50% of an amount, divide it by 2. 25% is a quarter, so if you want to find 25% of something, divide it by 4. 20% is a fifth, so if you want to find 20% of something, divide it by 5. 10% is a tenth, so if you want to find 10% of something, divide it by 10. Use these methods to find the answers to these questions.