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If 15% of(A + B)= 25% of(A - B),then what percent of B is equal to A1). 10%2). 60%3). 200%4). 400%

Answer»

15 $ \% $ of (A+B)$=25\% $ of (A-B)$\Rightarrow \FRAC{15}{100}(A+B)=\frac{25}{100}(A-B)$$\Rightarrow 15(A+B)=25(A-B)$$\Rightarrow 15A+15B=25A-25B$$\Rightarrow 10A=40B$$\Rightarrow A=4B$Now, LET $X\%$ of B is equal to A$\therefore \frac{x}{100}\times B=A$$\Rightarrow \frac{x}{100}\times B=4B$$\therefore x=400\%$



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