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Math Problems
Grade 7
Percents of numbers: word problems
In a recent poll conducted by the Avalanche High School student newspaper,
45
%
45\%
45%
of respondents said they have performed community service. If the poll respondents are representative of the
1300
1300
1300
students attending Avalanche High School, how many students have performed community service?
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The value of
x
x
x
is decreased by
39
%
39 \%
39%
. Which expression does NOT represent this situation?
\newline
39
x
39 x
39
x
\newline
x
−
0.39
x
x-0.39 x
x
−
0.39
x
\newline
0.61
x
0.61 x
0.61
x
\newline
1
x
−
0.39
x
1 x-0.39 x
1
x
−
0.39
x
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An estimated
3
3
3
out of every
25
25
25
men are left-handed.
\newline
What percent of men are left-handed?
\newline
%
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There was a total of
640
640
640
students at school on Friday. Every student either walked or rode in a bus to the school. If
45
%
45\%
45%
of the total number of students walked to school on Friday, how many students rode in a bus to the school?
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Owen answered a set of math and history Quiz Bowl questions. Owen correctly answered
3
4
\frac{3}{4}
4
3
of all the
20
20
20
questions. However, Owen answered
5
6
\frac{5}{6}
6
5
of the math questions correctly. If
1
2
\frac{1}{2}
2
1
of the questions were in math, what percent of history questions did Owen answer correctly?
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Of the
50
50
50
U.S. states,
4
4
4
have names that start with the letter W . What percent of U.S. states have names that start with the letter W?
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Owen answered a set of math and history Quiz Bowl questions. Owen correctly answered
72
%
72\%
72%
of all the
200
200
200
questions. However, Owen answered
53.3
%
53.3\%
53.3%
of the math questions correctly. If
45
%
45\%
45%
of the questions were in math, what percent of history questions did Owen answer correctly?
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