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Q. Raheel's income is 25% more than that of Rauf. What percent is Rauf's income less than Raheel? The answer in the book is 20%, can anyone please explain the solution? |
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Answer» Let Raheel(x) INCOME is REPRESENTED by lx and that of Rauf(y) income is represented by ly.Stating that the income of x (Ix) is 25% more than that of y (IY) is equivalent to saying that Ix is 125% of Iy.Ix is 125% of Iy MEANS Ix = 1.25⋅IyNow we want to find Iy as it RELATES to Ix, so we solve that equation for Iy : Iy = 1/1.25 Ix= 100/125 Ix = 4/5 lx= 0.80 Ix, it means Iy is 80% of Ix, or 20% less than Ix |
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