Question 850389
You can solve this by choosing a number to start from, as this is a ratio.

If sarita has 100, then saroja has 25% more or 125. Since 100/125 is .8 or 80%, sarita has 20% less than saroja. 

1.25 and .8 are reciprocals, as 1.25 * .8 = 1. and 80% of 125% = 100%