Estimating Percents Worksheet

**Page 1**

1.

Estimate 50% of 80.7.

a. | 50 | ||

b. | 20 | ||

c. | 40 | ||

d. | 12 |

[Expression to be evaluated.]

=

[Rewrite 50% with an equal fraction

=

[Replace 80.7 with 80, which is compatible with the fraction.]

=

= 40

[Simplify.]

Correct answer : (3)

2.

John spent $40.45 for dinner. Which of the following is a good estimate of a 20% tip on the bill?

a. | $4 | ||

b. | $10 | ||

c. | $8 | ||

d. | $20 |

[Expression to be evaluated.]

=

[Rewrite 20% with an equal fraction

=

[Replace 40.45 with 40, which is compatible with the fraction.]

=

= 8

[Simplify.]

So, a good estimate of a 20% tip on the bill $40.45 is $8.

Correct answer : (3)

3.

A basketball team made 11 out of 52 shots. About what percent of shots were made?

a. | 25% | ||

b. | 20% | ||

c. | 80% | ||

d. | 75% |

=

=

[Replace 11 with 10 and 52 with 50.]

=

= 20

So, the percent of shots were made is 20%.

Correct answer : (2)

4.

In an election, 25% of voters voted for bonds for a new school. If 2003 votes were cast, about how many voted for the bonds?

a. | 250 | ||

b. | 700 | ||

c. | 600 | ||

d. | 500 |

[Expression to be evaluated.]

=

[Rewrite 25% with an equal fraction

=

[Replace 2003 with 2000, which is compatible with the number.]

=

= 500

[Simplify.]

So, about 500 people voted for the school bonds.

Correct answer : (4)

5.

Which of the following models represent 0.75%?

a. | Model 1 | ||

b. | Model 2 | ||

c. | Model 3 | ||

d. | Model 4 |

Each small square represents 1%.

Model 1 and Model 2 has 75 small squares shaded, representing 75%.

Model 3 has

Model 4 has

Therefore, Model 4 represents 0.75%.

Correct answer : (4)

6.

Which of the following models represent more than 0.25% and less than 1%?

a. | Model 1 | ||

b. | Model 1, Model 2 and Model 3 | ||

c. | Model 3 and Model 4 | ||

d. | Model 2 and Model 3 |

Each small square represents 1%.

Model 1 has 1 small square shaded, representing 1%.

Model 2 has

Model 3 has

Model 4 has

Therefore, the models representing more than 0.25% and less than 1% are Model 2 and Model 3.

Correct answer : (4)

7.

Which of the following models represent 0.50%?

a. | Model 1 | ||

b. | Model 1 and Model 4 | ||

c. | Model 4 | ||

d. | Model 2 and Model 3 |

Each small square represents 1%.

Model 1 has

Model 2 has

Model 3 has

Model 4 has 50 small squares shaded, representing 50%.

Therefore, Model 1 represents 0.50%.

Correct answer : (1)

8.

Which figure has the least shaded portion?

a. | Figure 1 | ||

b. | Figure 4 | ||

c. | Figure 3 | ||

d. | Figure 2 |

Percent of the shaded region in Figure 2 =

Percent of the shaded region in Figure 3 =

Percent of the shaded region in Figure 4 =

20% < 36% < 39% < 40%

[Compare the percents.]

So, Figure 4 has the least shaded portion.

Correct answer : (2)

9.

Estimate 15% of 183.

a. | 81 | ||

b. | 54 | ||

c. | 27 | ||

d. | None of the above |

[Expression to be evaluated.]

=

[Rewrite 15% with an equal fraction

=

[Replace 183 with 180, which is compatible with the fraction.]

=

[Cancel 180 with 20 .]

= 27

[Simplify.]

15% of 183 is 27.

Correct answer : (3)

10.

A football team won 63% of the 48 games they played. Estimate the number of games they lost.

a. | 18 | ||

b. | 25 | ||

c. | 28 | ||

d. | 24 |

=

[Rewrite 63% as a fraction compatible with 48.

63%

= 30

[Multiply.]

The football team won a total of 30 games.

= 48 - 30 = 18

Number of games lost = Total number of games played - Number of games won

[Subtract.]

The football team lost about 18 games.

Correct answer : (1)