If the price of sugar is increased by 20%, then by what percent should a housewife reduce its consumption so that no expenditure on it increases?

The salary of a person is increased by 20%. By what % the new salary must be reduced to restore the original salary?

Joseph's income is decreased by 10%, by what percent the new income has to be increased to bring his income back to the previous level?

The price of sugar is reduced by 20%. Now a person can buy 500g more sugar for ₹ 36. The original price of the sugar per kilogram was: 

32 is what percentage of 80?

If the radius of the base of a right circular cylinder is increased by 20% and the height is decreased by 30%, then what is the percentage increase/decrease in the volume?

The income of Aman is Rs. 30,000 per month and his expenditure is Rs. 20,000 per month. In the next month, his income increases by Rs. 10,000 per month, and expenditure increases to Rs. 25,000 per month. In the next month, his savings increases by what percent?

When the tax on an article is increased by 20%, its consumption is decreased by 20%. In total tax receipt on this item-