Math 105 Practice Worksheet
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1Math 105 Ch 5 and 6
Practice Exam
NAME_________________________________________
You must show your work to receive full credit. Underline, circle or otherwise indicate your final answer.
1. Evaluate the given expression.
2
⎛ ⎞
2 1
1
7
(
)
+ ÷ − ⎜ ⎟
−
÷
÷
2
3
6
3 18 3
9
34
a)
ans:
b)
ans:
⎝ ⎠
3
2
2
12
(
)
(
)
−
⋅
÷
÷ −
÷
−
3
2
2
3
4 2 3
12
25
8
2 4 12 3
4
0
c)
ans:
d)
ans:
2. Solve the following.
a) 19% of 1800 is what number? ans: 342
b) 28.5 is what percent of 75? ans: 38%
3
5
%
c) 23.32 is
of what number?
ans: 440
C) What number is 125% of 150? ans: 187.5
10
3. Write each percent as a decimal.
.015%
206%
a)
ans: 0.00015
b)
ans: 2.06
4. Write each decimal or fraction as a percent.
3
0.341
1
a)
ans: 34.1%
b)
ans: 175%
4
5. Write each percent as a fraction in simplest form.
27
3
7
21.6%
8
a)
ans:
b)
% ans:
125
4
8
6. For each proportion, find the unknown number n.
1
n
4
5
2
=
n =
=
n =
3
0.75
a)
ans:
b)
ans:
1
8
0.6
n
1
3
8. Write each fraction as a decimal number.
7
11
0.7780
0.730
a)
round to nearest thousandth ans:
b)
round to nearest hundredth ans:
9
15
3
3
9. Carlos can type 680 words in
minutes. To the nearest whole word, how many words per minute can he type?
4
181
ans:
3
6
10. On a blueprint 1 inch corresponds to 8 feet. Find the actual length of a wall represented by a line
inches long on
5
52.8
the blue print. ans:
11. The Acme furniture company currently produces 4840 chairs per month. If production decreases by 15%, find the
decrease and the new number of chairs produced each month.
decrease: 726, produced per month: 4114
ans:
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