Question

Ravi's income is $25$% more than that of Raghu. What percent is Raghu's income less than that of Ravi?

Answer 1

Let Raghu's income be $Rs.100$. Then, Ravi's income is $Rs.125$. Put this in the reverse way. If Ravi's income is $Rs.125$, Raghu's income is $Rs.100$. Hence if Ravi's income is $Rs.1$, Raghu's income is $Rs\frac{100}{125}$. Changing the scale to $100$, if Ravi's income is $Rs.100$, the Raghu's income is $Rs\frac{100}{125}\times 100=Rs.80$. Therefore Raghu's income is $100-80=20$% less than that of Ravi.