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1. Sixty-five percent of a number is 21 less than; four-fifth of that number.What is the number?
- A. 140
- B. 140
- C. 140
- D. 140
Answer: Option A
Explanation:
Hints: Let, the number is x
65% of x is = 65x/ 100 = 13x / 20
According to condition
13x/20 = 4x/5 - 21
4x/5 - 13x/20 = 21
(16x - 13x) /20 = 21
3x = 420
x = 140
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