If the price of salt decreases by 20% then by what percentage should consumption be increased to keep the expenditure same?

A person spends 50% of his monthly salary on house rent. If he spends ₹912 on transport and ₹3,799 on groceries every month and saves the remaining ₹131, then find his monthly salary (in ₹).

The income of Ajay is ₹45000. He saves 18% of the income. Vijay's expenditure is 20% more than Ajay's expenditure and his savings is ₹3420. Vijay's income is what percent more than the income of Ajay?

The expenditure of Sudha is 125% more than her savings. If expenditure decreases by 14% and savings increase by 38%, find % increase in income.

The price (per litre) of petrol increases by 40%. By what percent should its consumption be reduced such that the expenditure on it increases by 12% only?

The income of Avin is 54,000 which is 20% less than that of Bharat. The expenditure of Bharat is 12% more than the income of Avin and the expenditure of Avin is 25% less than the expenditure of Bharat. The difference between the savings of Avin and Bharat is:

Petrol price increases by 75%. By what percent should consumption be reduced so that expenditure increases only by 26%?

The price (per litre) of petrol increases by 50%. By what percent should its consumption be reduced such that the expenditure on it increases by 32% only?

If 20% of a number is 50, then what is that number?

The price (per litre) of petrol increases by 80%. By what percent should its consumption be reduced such that the expenditure on it increases by 17% only?

The price of sugar increased by 22.5%. Anita wants to keep her expenditure on sugar same as before. By what percentage must she reduce her consumption of sugar (correct to two place of decimals)?