Two successive discounts of 25% and 20% are equal to a single discount of:

💡 Solution & Explanation

Take the price as 100. After 25% off it is 75. The second discount of 20% is on 75, which is 15, leaving 60. The total reduction is 40, so the single discount is 40%. Shortcut: a + b − ab/100 = 25 + 20 − 5 = 40%. Simply adding gives 45%, which is too high.