A number, on subtracting 15 from it, reduces to its 80%.

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A number, on subtracting 15 from it, reduces to its 80%. What is 40% of the number?

1. 75
2. 60
3. 30
4. 90

Correct Option: C

If the number be ₹ x, then

x – 15 =	4x
	5

⇒ 5x – 75 = 4x ⇒ x = 75

∴ 40% of 75 =	75 × 40	= 30
	100