1. If x is a% more than y, then y is [{ a/(100+a)}× 100]% less than x.
2. If x is a% less than y, then y is [{a/(100-a)}× 100]% more than x.
Q. If income of Ravi is 20% more than that of Ram, then income of Ram is how much per cent less than that of Ravi?
EXPLANATION
Here a =20%
According to the formula,
Required percentage...
