When the price of an audio system was reduced by 20%, the sale increased by 80%. What was the net effect on the sale?

If a number x is 10% less than another number y and y is 10% more than 125, then x is equal to-

The monthly income of a person was ₹ 13,500 and his monthly expenditure was ₹ 9,000. Next year his income increased by 14% and his expenditure increased by 7%. The per cent increase in his savings was  

If A’s income is 40 % less than that of B, how much percent B's income is more than that of A? 

The cost of an article was 75. The cost was first increased by 20% and later on it was reduced by 20%. The present cost of the article is:

If "basis points" are defined so that 1 percent is equal to 100 basis points, then by how many basis points is 82.5 percent greater than 62.5 percent. 

If the sales tax be reduced from $$ 3{1\over2}$$ % to $$ 3{1\over3}$$%, what difference does it make to person who purchases an article whose marked price is Rs.8400? 

The price of an article is reduced by 25% but the daily sale of the article is increased by 30%. The net effect on the daily sale receipts is