Solution
Expression : 35% of (x + y) = 40% of (x - y)
=> $$\frac{35}{100}\times(x+y)=\frac{40}{100}\times(x-y)$$
=> $$35x+35y=40x-40y$$
=> $$40x-35x=35y+40y$$
=> $$5x=75y$$
=> $$\frac{x}{y}=\frac{75}{5}=15$$
$$\therefore$$ Required % = $$15\times100=1500\%$$
=> Ans - (A)
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