Algebra 1 Common Core Student Edition, Grade 8-9

Lesso n Ch eck

Do y o u k n o w H OW?

1. W hat percent o f7 0 is 2 1?


2. W hat percent of 50 is 60?


3. W hat is 35% of 80?


4. 75% of w hat n u m b e r is 36?


5. Finance How m u ch interest will you ea rn by
   investing $1200 at a sim ple interest rate of 2.5% p e r
   year for 6 y e a r s?

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Do y o u UN DERSTAN D? ^ PRAaf cES

6. V o c a b u l a r y Complete: p% is equivalent to a fraction

w ith a n u m e ra to r of p an d a d en o m in ato r of _?_.

7. Reasoning You d ep o sited m on ey in a savings
   ac co u n t paying 4% sim ple interest p e r year. The first
   year, you e a rn e d $75 in interest. How m uch interest
   will you earn during th e following year?

8. O p e n - E n d e d Give an exam ple of a p ercen t problem

w here th e p a rt is greater th a n th e base.

Pr act i ce an d Pr o b l em - So l v i n g Ex er ci ses

^ Practice Find each percent.

9. W hat p ercen t of 75 is 15?


10. W hat p ercen t of 16 is 10?


11. W hat p ercen t of 48 is 20?

Find each part.

15. W hat is 25% of 144?


16. W hat is 12.5% of 104?


17. W hat is 125% of 12.8?

MATHEMATICAL

PRACTICES

4^ See Problems 1 and 2.

10. W hat p ercen t of 15 is 75?


11. W hat p ercen t of 32 is 40?


12. W hat p ercen t of 88 is 88?

See Problem 3.

16. W hat is 63% of 150?


17. W hat is 150% of 63?


18. What is 1% of 1?


19. Shopping A tennis racket norm ally costs $65. The ten n is racket is on sale for 20%
    off. W hat is th e sale price of th e tennis racket?


20. Hair Care A beauty salon buys bottles of styling gel for $4.50 p e r bottle an d m arks
    u p th e price by 40%. For w hat price does th e salon sell each bottle?

Find each base.

23. 20 % of w hat n u m b e r is 80?


24. 60% of w hat n u m b e r is 13.5?


25. 150% of w hat n u m b e r is 34?

^ See Problem 4.

24. 80% of w hat n u m b e r is 20?


25. 160% of w hat n u m b e r is 200?


26. 1 % of w hat n u m b e r is 1?


27. Finance You d eposit $1200 in a savings ac co u n t th a t earns sim ple interest
    at a rate of 3% p e r year. How m u c h interest will you have ea rn e d after 3 years?


28. Finance You deposit $150 in a savings ac co u n t th a t earns sim ple interest at a rate of
    5.5% p e r year. How m u ch interest will you have ea rn ed after 4 years?

See Problem 5.

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