- A6.67
- B6.25
- C5
- D7.5
Step-by-Step Solution
The fall is 960 − 900 = 60 mm and the base for a percent decrease is the earlier value 960. So the decrease is (60 ÷ 960) × 100 = 6.25 percent. Using 900 as the base would wrongly give 6.67.
Answer: B) 6.25
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