Q Apply Tell whether you are finding a percent, a part, or a base. Then solve.- W hat is 9% of 56? 32. W hat p ercen t of 36 is 96? 33. W hat is 95% of 150?
- W hat is 175% of 64? 35. W hat p ercen t of 30 is 400? 36. 60 is 250% of w hat num ber?
37.38.Solve using mental math.- 20% of 80 is J. 40. 120 is 200% of J. 41. 30 is J_% of 40.
Tell which is greater, A or B. Assume A and B are positive numbers.
- A is 20% of B. 43. 150% of A is B. 44. B is 90% of A.
4 5. T h in k A b o u t a Plan The U nited States M int re p o rted at th e en d of 2006 th at the
u n it cost of producing an d distributing a p en n y was 1.21C. W hat p ercen t of the
value of a p en n y is this cost? W hat can you conclude ab o u t th e cost of m aking
pennies?- How can a m odel help you to visualize th e problem?
- How can you use a pro p o rtio n or th e p ercen t equation to solve th e problem?
- Economics W ould you p roduce an item if th e cost of producing an d distributing
the item w ere m ore th a n 100% of its value? Explain your answer.
4 7. E rro r A n alysis A stu d en t was asked to m ake up an d solve a p ercen t problem , so
th e stu d en t wrote, "What p ercen t of 1.5 is 3?” a n d solved it as show n at th e right.
D escribe an d correct th e error in th e stu d en t's solution.- Writing Part of a bottle of w ater has b e e n consum ed. W rite the steps n e e d e d to
determ ine th e p ercen t of w ater th at has b ee n consum ed. - Finance A savings a ccount earns sim ple interest at a rate of 6 % p e r y e a r. L a s t y e a r
the acco u n t ea rn ed $10.86 in interest. W hat was th e balance in th e account at the
beginning of last year? - Furniture A furniture store offers a set of furniture for $990. You can also p urchase
th e set on an installm ent p lan for 24 paym ents of $45 each. If you choose the
installm ent plan, w hat p ercen t of th e original price will you have p aid w h e n you
finish? R ound to th e n ea rest percent.
Geography W ater covers approxim ately 11,800 m i 2 of
Florida, w hich is a b o u t 18% of Florida’s area. W hat is the
total area of Florida to th e n ea rest th o u sa n d square miles?
Finance A stu d en t h as $1500 to deposit in a savings account. W hat
is th e lowest rate th a t w ould allow th e s tu d e n t to ea rn $95 in sim ple
interest in a year?
(3 D 5.5%
C D 6.25%
C D 6.33%
CD 7%142 Ch a p t e r 2 So l v i n g Eq u a t i o n s