Percentage Increase and Decrease Quiz

Percentage Changes

• To find the percentage increase from 50 to 60, first, find the difference: 60 - 50 = 10, then divide by the original number: 10 ÷ 50 = 0.2, and multiply by 100: 0.2 × 100 = 20%.
• The percentage decrease from 65 to 50 is the opposite of the percentage increase from 50 to 65, so first, find the difference: 65 - 50 = 15, then divide by the original number: 15 ÷ 65 = 0.23, and multiply by 100: 0.23 × 100 = 23%, but since it's a decrease, make it negative: -23%.
• The percentage increase from 50 to 55 is found by first finding the difference: 55 - 50 = 5, then dividing by the original number: 5 ÷ 50 = 0.1, and multiplying by 100: 0.1 × 100 = 10%.
• The percentage increase from 40 to 52 is found by first finding the difference: 52 - 40 = 12, then dividing by the original number: 12 ÷ 40 = 0.3, and multiplying by 100: 0.3 × 100 = 30%.
• The percentage increase from 50 to 65 is found by first finding the difference: 65 - 50 = 15, then dividing by the original number: 15 ÷ 50 = 0.3, and multiplying by 100: 0.3 × 100 = 30%.