CUET Preparation Today
CUET
General Test
Numerical Ability
Percentages
If 70% of (x - y) = 30% of (x + y) then what percent of x is y?
20%
50%
40%
30%
70% of (x - y) = 30% of (x + y) 7(x - y) = 3(x + y) \(\frac{(x+y)}{(x-y)}\) = \(\frac{7}{3}\) By componendo and dividendo \(\frac{x}{y}\) = \(\frac{10}{4}\) = \(\frac{5}{2}\) x = 5 and y = 2 Required percentage =\(\frac{2}{5}\) × 100 = 40%
