Due to some mishap Ahmed lost `12(1)/(2)%` of his total earnings.He spent `70%` of the remaining amount and is left with " 2100" in his pocket.Find his total earning

After spending 69% of his earning a man has Rs. 930 left, find his income.

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?

A person earns ₹ 54000 per month. He spends 2/15 of his earnings on house rent, 4/9 of his earnings on other household items and saves and remaining. What fraction of amount is the savings in his earnings ?