Two successive discounts of 30% and 50% are equal to a single discount of:

💡 Solution & Explanation

Take the price as 100. After 30% off it is 70. The second discount of 50% is on 70, which is 35, leaving 35. The total reduction is 65, so the single discount is 65%. Shortcut: a + b − ab/100 = 30 + 50 − 15 = 65%. Simply adding gives 80%, which is too high.