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When 35 is subtracted from a number, it reduced to its 80%. What is 4/5th of that number?

70
90
120
140

Correct Answer: 140

Explanation:

Let the number be N.
Then N - 35 = 80N/100
⇒ N - 4N/5 = 35
⇒ N / 5 = 35
⇒ N = 175
∴ Required number = 175 x (4/5)
= 35 x 4 = 140

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