Algebra Q # 17
0. If 50% of (x - y) = 30% of (x + y), what per cent of x is y?
- Option : C
- Explanation : 50% of (x-y) = 30% of (x + y)
⇒ (50/100) (x - y) = (30/100) (x + y)
⇒ 5x - 5y = 3x + 3y ⇒ 2x = 8y ⇒ x = 4y
Required percentage = y/x × 1000%
= (y/4y) x 100% = 25%
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