Correct Answer - Option 4 : 400%
Given:
15% of (x + y) = 25% of (x - y)
Formula used:
Percentage = (Obtained value/Total value) × 100
Calculation:
15% of (x + y) = 25% of (x - y)
⇒ 15(x + y) = 25(x - y)
⇒ 15x + 15y = 25x - 25y
⇒ 15y + 25y = 25x - 15x
⇒ 40y = 10x
⇒ x = 4y
Now, Percentage = (Obtained value/Total value) × 100
⇒ (x/y) × 100
⇒ (4y/y) × 100
⇒ 400%