A tank holds 400 litres and 100 litres have been used. What percentage of the water remains?
Answer and explanation
Correct answer: C. 75%
- Step 1: Remaining = 400 − 100 = 300 litres.
- Step 2: Percentage remaining = 300 ÷ 400 × 100 = 75%.
Answer
75%.
Why not the others: 25%: this is the percentage used, not the percentage remaining. 90%: the used amount was divided by 10. 100%: the used amount was given as a percentage.
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