Multiple choice

Two successive discounts of 30% and 70% are given. What will be the net discount (in percentage)?

  1. 63

  2. 79

  3. 100

  4. 87
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Successive discounts of 30% and 70% mean the remaining value is (1 - 0.30) * (1 - 0.70) = 0.70 * 0.30 = 0.21. The net discount is 1 - 0.21 = 0.79, or 79%.

AI explanation

To find the net discount for two successive discounts, use the formula net discount percentage equals the sum of the individual discounts minus their product divided by 100. The working is 30 plus 70 minus 30 times 70 divided by 100, which gives 100 minus 21. This equals 79 percent.

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