Practise the method.Example 1A price rises by 29% and then falls by 29%. What is the overall percentage decrease?Show worked answerAnswer: 8.41The multipliers have product 1−(10029)2.Therefore the decrease is 8.41%.Example 2An item is discounted by 10%, then 5% tax is added to the reduced price. The final price is $2929.5. Find the original price in dollars.Show worked answerAnswer: 3100Undo the multipliers.2929.0.9×1.055=3100.Example 3A price rises by 13% and then falls by 13%. What is the overall percentage decrease?Show worked answerAnswer: 1.69The multipliers have product 1−(10013)2.Therefore the decrease is 1.69%.