The cost of onion has increased by 20%. Ramchandra babu has decided not to exceed the monthly expenses towards the purchase of onion. Let’s calculate in percentage how much he will reduce the use of onion per month.

The price of sugar has increased by 20%. Let’s work out the percentage of sugar uses should be decreased if the monthly expenses of sugar remained same.

A person trying to lose weight by burning fat lifts a mass of 10 kg up to a height of 1m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up ? Fat supplies 3.8xx10^7J of energy with a 20% effciency rate.Take g=9.8m//s^2

Today my father has bought 15 kg. of rice, for Rs. 390. Let’s work out using the Rule of Three method how much he would require if he would have bought the same quality of 17 kg of rice

Trisha has bought a book from the book stall of Milan dada. Milandada gave her discounts of 10% and 5% respectively. Let’s work out how much Trisha paid to Milandada if the M.R.P. of the book was Rs. 200.