Multiplied by 3 instead of dividing by 3. % increase?
- 200%
- 400%
- 600%
- 800%
Explanation
Let the original number be x
Correct result: x ÷ 3
Wrong result: x × 3
Now, compare:
Increase = (x×3 − x/3) = (9x − x)/3 = 8x/3
% Increase = (8x/3) ÷ (x/3) × 100 = 800%
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