TUTORING: Percent Practice

The bill for Jacoby's breakfast at a Nashville restaurant is $9. He wants to leave a 20% tip. How much should the tip be?

Yesterday, there were 80 problems assigned for math homework. Harry did 80% of them correctly. How many problems did Harry get right?

Tara bought new headphones on sale for 70% of the original price of $150. How much did she pay for the headphones?

The $300 shoes Jay bought were on sale for 25% off. What amount did Jay get off the price?

A store sold 650 bicycles last year. This year the store sold 572 bicycles. What is the percent decrease in the number of bicycles sold from last year to this year?

Mack shot an 86 on the golf course on Monday. ​Then, on Friday he shot a 95.​ what is the percent increase in his score?

(round to nearest whole percent)