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Section Two: SAT Math Percents

Practice \ 65

4. If 60 percent of Wequals 20 percent of T, what

PRAGICE SET
percent of T is VV?
(A) 12%
Basic
1. If 48 of the 60 seats on a bus were occupied, what 1
(B) 33-%
3
percent of the seats were not occupied?
(A) 12% (C) 60%

(B) 20%
(D) 120%
(C) 25%
(D) 60% (E) 1331%
3
(E) 80%
5. 36 percent of 18 is 18 percent of what number?
2. 4 people shared a taxi to the airport. The fare was (A) 9
$36.00, and they gave the driver a tip equal to 25
(B) 24
percent of the fare. If they equally shared the cost
of the fare and tip, how much did each person (C) 36

pay? (D) 40

(A) $9.00 (E) 48

(B) $9.75
6. A closet contains 24 pairs of shoes. If 25 percent
(C) $10.25 of those pairs of shoes are black, how many pairs
(D) $10.75 are NOT black?
(E) $11.25 (A) 4
(B) 6
3. In a certain class if Edie' s average rose from 72 to
84, by what percent did her average increase? (C) 12
(D) 18
(A) 12%
(E) 20
2
(B) 14-% 7. What is the percent discount on a jacket marked
7
down from $120 to $100?
2 2
(C) 16-% (A) 10-%
3 3
2
(D) 66-%
3 (B) 20%

5
(E) 85--% (C) 30%
7

1
(D) 33-%
3

(E) 40%
 -

Section Two: SAT Math Practice

Chapter Seven

Medium
8. A survey found that 80 percent of the apartments 12. Bob took 20 mathtestslastyear. If he failed 6 of
in City G have smoke alarms installed. Of these, them, what percent of the math tests did he pass?
20 percent have smoke alarms that are not work- 1
ing. What percent of the apartments in City G (A) 37-%
2
were found to have working smoke alarms?

(A) 60% (B) 60%

1
(B) 64% (C) 62-%
2

2 2
(C) 66-% (D) 66-%
3
3

(E) 70%
,(D) 70%
13. In a certain box of gloves, 12 pairs are size 7 and
(E) 72% 24 pairs are size 6. If all the gloves in the box are
either size 6 or size 7, what percent of the gloves
9. What percent of 40 is 8? in the box are size 6?
1
(A) 5% (A) 33-%
3
(B) 10%
(C) 20% (B) 50%
(D) 22.5%
(E) 30%

10. When Joe started his exercise program, he could

do 12 pushups in a minute. After he had been (D) 75%
practicing for two weeks, he could do 21 pushups
in a minute. By what percent did Joe's rate of (E) 200%
doing pushups increase?

(A) 9% 14. If 65 percent of x is 195, what is 75 percent of x ?

(B) 21% (A) 215

(C) 42% (B) 225
(D) 57% (C) 235
(E) 75% (D) 250
(E) 260
11. What is 10 percent of 20 percent of 30?

l ,.~'
IF;',',;..
 Section Two: SATMathPercents
practice/

15. A 25-ounce solution is 20 percent alcohol. If 50

18. What is 0.02 percent of 2.5 percent of 0.8?
ounces of water are added to it, what percent of
the new solution is alcohol? CA) 0.0004
CA) 5% CB) 0.00004
Cc) 0.000004
2
CB) 6-% CD) 0.0000004
3
CE) 0.00000004
CC) 10%
If
19. The price of a newspaper rises from 5 cents to 15
1 cents. What is the increase in price?
I1

CD) 13-% r

3 CA) 50%
CB) 75%
CE) 20%
CC) 100%
CD) 150%
16. A store sells a watch for a profit of 25 percent of
the wholesale cost. What percent of the selling CE) 200%
price of the watch is the store's profit?
CA) 12.5% 20. After getting a 20 percent discount, Jerry paid
CB) 20% $100 for a bicycle. How much, in dollars, did the
bicycle originally cost?
CC) 25%
CD) 50% Hard
CE) 75%
21. A stock decreases in value by 20 percent. Bywhat
percent must the stock price increase to reach its
17. In 2002,30 percent of the 200 apartment units on former value?
a certain street were condominiums. By 2003, the
CA) 15%
total number of units on the street had increased
by 25 percent, and 40 percent of units were con- CB) 20%
dominiums. What was the percent increase of Cc) 25%
condominiums during this period.
1 CD) 30%
CA) 10-%
5 CE) 40%

CB) 30%
22. The population of a certain town increases by 50
percent every 50 years. If the population in 1950
1
Cc) 33-% was 810, in what year was the population 160?
3
CA) 1650
CD) 40% CB) 1700
Cc) 1750
CD) 1800
CE) 1850
 Section Two: SAT Math Practice
Chapter Seven

23. A man bought 10 crates of oranges for a total 26. The number that is 400 percent greater than 15 is
cost of $80. If he lost 2 of the crates, at what price what percent greater than 150 percent of 3D?
would he have to sell each of the remaining crates
(A) 15%
in order to earn a total profit of 25 percent of the
total cost?
(B) 25%
(A) $10.00 (D) 33-%
(C) 66-% 3
2 3
(B) $12.50 (E) 1661-% 1
(C) $15.00
(D) $100.00
(E) $120.00

24. In a certain school, 50 percent of all male students

and 60 percent of all female students play a varsity
sport. If 40 percent of the students at the school
are male, what percent of the students DO NOT 27. If increasing 20 by P percent gives the same result
play a varsity sport? as decreasing 60 by P percent, what is P percent of
70?
(A) 44%
(B) 50% 28. A baseball team won 45 percent of the first 80
(C) 55% games it played. How many of the remaining 82
(D) 56% games will the team have to win in order to win
exactly 50 percent of all the games it plays?
(E) 60%

25. The quantities a, b, and c are positive and ab

equals~. If a is increased by 50 percent and b is

4
decreased by 25 percent, then, in order for the

equation to remain true, c must be

(A) decreased by 25%

1
(B) decreased by 12-%
2

(C) increased by 121..0/0

2

(D) increased by 25%

(E) increased by 50%