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