A man spends `20 %` of his earnings on education and `25 %` of this amount on books. What percent of his total earnings does he spend on books?

Raju spends 40 % of his income on food. 35 % he spends on rent and dress and 10 % on his children's education. The rest he saves and this amounts to Rs. 450 . What is his total income? How much does he spend on food?

Rafi earns 20000 rupees a month and he spends 6400 rupees from this on food. What percent of his earnings is this?

Basic salary of Damu is Rs. 4200. In addition to this he will get Rs. 1260 as dearness allowance. What percentage of his salary is the dearness allowance?

Each month Joseph donates 8 % of his earnings to the Medical Aid Fund. He earned 12000 rupees in January. How much should he donate that month?

Jayan spent 8400 rupees in a month for food and it is 35 % of his earnings. How much did he earn that month?

Johny save 15 % of his earnings each month. In January he got 32000 rupees. How much would he save?

Shine sold two crates of apple at 3500 rupees each. He got 20 % profit in one sale and 20 % loss in the other. Did the total sale result in a profit or loss? What percentage?

A manufacture produces nuts and bolts. The time required to produce one packet of nuts and one packet of bolts on machines. A and B is given the following table. He earns a profit of Rs. 25 per packet of nuts and Rs. 12 per packet of bolts. He operates his machine for atmost 15 hours a day. Formulate a linear programming problem to maximise his profit.

If a trader raises price by 20 % and then sells at 20 % discount, does he make a profit or suffer a loss? What percent?