McGraw Hill Math Grade 8 Lesson 6.6 Answer Key Percents and Fractions

Practice the questions of McGraw Hill Math Grade 8 Answer Key PDF Lesson 6.6 Percents and Fractions to secure good marks & knowledge in the exams.

McGraw-Hill Math Grade 8 Answer Key Lesson 6.6 Percents and Fractions

Exercises Calculate Using Multiplication

Question 1.
18 is ____ % of 60
Answer:
30%,

Explanation:
18 is x% of 60,
18 = \(\frac{x}{100}\) X 60
x = \(\frac{18 X 100}{60}\)
x = \(\frac{1800}{60}\)
x = 30

Question 2.
20% of 85 is ___________
Answer:
17,

Explanation:
20% of 85 is,
\(\frac{20}{100}\) X 85 = x
\(\frac{20 X 85}{100}\) = x
\(\frac{1700}{100}\) = x
x = 17

Question 3.
\(\frac{42}{70}\) = ____ %
Answer:
60%,

Explanation:
\(\frac{42}{70}\) = x%
70x = 42
x = \(\frac{42}{70}\)
x = 0.6
Multiply with 100 to convert into percentage,
0.6 x 100 = 60%

Question 4.
30% of 90 is ___________
Answer:
27,

Explanation:
30% of 90 is,
\(\frac{30}{100}\) X 90 = x
\(\frac{30 X 90}{100}\) = x
\(\frac{2700}{100}\) = x
x = 27

Question 5.
\(\frac{16}{128}\) = ____ %
Answer:
12.5%,

Explanation:
\(\frac{16}{128}\) = x%
128x = 16
x = \(\frac{16}{128}\)
x = 0.125
Multiply with 100 to convert into percentage,
0.125 x 100 = 12.5%

Question 6.
\(\frac{12}{48}\) = ____ %
Answer:
25%,

Explanation:
\(\frac{12}{48}\) = x%
48x = 12
x = \(\frac{12}{48}\)
x = 0.25
Multiply with 100 to convert into percentage,
0.25 x 100 = 25%

Question 7.
15% of 60 is __________
Answer:
9,

Explanation:
15% of 60 is,
\(\frac{15}{100}\) X 60 = x
\(\frac{15 X 60}{100}\) = x
\(\frac{900}{100}\) = x
x = 9

Question 8.
\(\frac{24}{160}\) = ____ %
Answer:
15%,

Explanation:
\(\frac{24}{160}\) = x%
160x = 24
x = \(\frac{24}{160}\)
x = 0.15
Multiply with 100 to convert into percentage,
0.15 x 100 = 15%

Question 9.
35% of 220 is ____
Answer:
77,

Explanation:
35% of 220 is,
\(\frac{35}{100}\) X 220 = x
\(\frac{35 X 220}{100}\) = x
\(\frac{7700}{100}\) = x
x = 77

Question 10.
1\(\frac{1}{5}\) = ____ %
Answer:
120%,

Explanation:
1\(\frac{1}{5}\) = x%
\(\frac{6}{5}\) = x%
5x = 6
x = \(\frac{6}{5}\)
x = 1.2
Multiply with 100 to convert into percentage,
1.2 x 100 = 120%

Question 11.
40% of 65 is ____
Answer:
26%,

Explanation:
40% of 65 is,
\(\frac{40}{100}\) X 65 = x
\(\frac{40 X 65}{100}\) = x
\(\frac{2600}{100}\) = x
x = 26

Question 12.
\(\frac{75}{250}\) = ____ %
Answer:
30%,

Explanation:
\(\frac{75}{250}\) = x%
200x = 75
x = \(\frac{75}{250}\)
x = 0.3
Multiply with 100 to convert into percentage,
0.3 x 100 = 30%

Question 13.
\(\frac{3}{50}\) = ____ %
Answer:
6%,

Explanation:
\(\frac{3}{50}\) = x%
50x = 3
x = \(\frac{3}{50}\)
x = 0.06
Multiply with 100 to convert into percentage,
0.06 x 100 = 6%

Question 14.
\(\frac{55}{1100}\) = ____ %
Answer:
5%,

Explanation:
\(\frac{55}{1100}\) = x%
1100x = 55
x = \(\frac{55}{1100}\)
x = 0.05
Multiply with 100 to convert into percentage,
0.05 x 100 = 5%

Question 15.
65% of 40 is ____
Answer:
26,

Explanation:
65% of 40 is,
\(\frac{65}{100}\) X 40 = x
\(\frac{65 X 40}{100}\) = x
\(\frac{2600}{100}\) = x
x = 26

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