1.a store increases the price of a sweater from $20 to $22.
what is the percent of increase?
2.kevin buys 4 folding chairs. each chair costs $13.50. the sales tax is 6.5%.
what is the amount of sales tax for kevin's purchases?
3.harriet's haircut costs $36.
as a tip, she gives the hairdresser 15% of this amount.
what is the total amount harriet pays for her haircut, including tip?
4.at an appliance store, the price of a refrigerator is marked up 25% to $406.25.
what was the price of the refrigerator before the markup?
5.clea estimates that a glass contains 250 ml of water. the actual amount of water in the glass is 279 ml.
to the nearest tenth of a percent, what is the percent error in clea's estimate?
6.the price of a wallet is $32.95 and the sales tax is 7.5%.
what is the total cost of the wallet?
7.a car salesman had $65,100 in total monthly sales last month. he made $1,953 in commission from those sales.
what is the salesman's commission as a percent of his total monthly sales?