Two successive discounts of 50% and 25% are equal to a single discount of:

💡 Solution & Explanation

Take the price as 100. After 50% off it is 50. The second discount of 25% is on 50, which is 12.5, leaving 37.5. The total reduction is 62.5, so the single discount is 62.5%. Shortcut: a + b − ab/100 = 50 + 25 − 12.5 = 62.5%. Simply adding gives 75%, which is too high.