14-5 Finding the Percent of a Number - Dublin Citythe... · Finding the Percent of a Number Find...
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Name © Pearson Education, Inc. 6 Topic 14 53 Reteaching 14-5 Reteaching 14-5 Finding the Percent of a Number Find 77% of 240. First estimate. 77% 75% 3 _ 4 3 _ 4 240 180 Use a decimal. Change the percent to a decimal. 77% 0.77 Multiply. 0.77 240 184.8 The answer 184.8 is close to the estimate 180. Use a proportion. Write the percent as a fraction. 77% 77 ___ 100 Write the proportion and solve. x ___ 240 77 ___ 100 100x 18,480 100x ____ 100 18,480 _____ 100 x 184.8 Find the percent of each number. 1. 25% of 24 2. 50% of 72 3. 72% of 88 4. 18% of 97 5. 66% of 843 6. 46% of 388 7. 89% of 111 8. 0.7% of 392 9. 110% of 640 10. Geometry Ava’s aquarium is 10 in. tall, 15 in. long, and 8 in. wide. The aquarium is 95% filled with water. How many cubic inches of water are in the aquarium? 11. DeWayne used his music club membership card to get 15% off the cost of a CD. If the regular price of the CD was $15.95, how much did DeWayne pay? 12. Marla bought a dress for $89.99. She paid 6.5% sales tax. What was the total cost of the dress? 13. Writing to Explain Tell how you could use a proportion to find 138% of 967. Why is the solution greater than the original number?
Transcript of 14-5 Finding the Percent of a Number - Dublin Citythe... · Finding the Percent of a Number Find...
Name©
Pea
rson
Edu
catio
n, In
c. 6
Topic 14 53
Reteaching 14-5
Reteaching
14-5Finding the Percent of a NumberFind 77% of 240.
First estimate.77% ! 75% ! 3 _ 4 3 _ 4 " 240 ! 180
Use a decimal.Change the percent to a decimal.
77% ! 0.77
Multiply.0.77 " 240 ! 184.8
The answer 184.8 is close to the estimate 180.
Use a proportion.
Write the percent as a fraction. 77% ! 77 ___ 100
Write the proportion and solve. x ___ 240 ! 77 ___ 100
100x ! 18,480
100x ____ 100 ! 18,480 _____ 100
x ! 184.8
Find the percent of each number.
1. 25% of 24 2. 50% of 72 3. 72% of 88
4. 18% of 97 5. 66% of 843 6. 46% of 388
7. 89% of 111 8. 0.7% of 392 9. 110% of 640
10. Geometry Ava’s aquarium is 10 in. tall, 15 in. long, and 8 in. wide. The aquarium is 95% filled with water. How many cubic inches of water are in the aquarium?
11. DeWayne used his music club membership card to get 15% off the cost of a CD. If the regular price of the CD was $15.95, how much did DeWayne pay?
12. Marla bought a dress for $89.99. She paid 6.5% sales tax. What was the total cost of the dress?
13. Writing to Explain Tell how you could use a proportion to find 138% of 967. Why is the solution greater than the original number?
30429_T14_50-55.indd 53 1/31/08 12:26:56 PM
Name©
Pea
rson
Edu
catio
n, In
c. 6
Topic 14 53
Reteaching 14-5
Reteaching
14-5Finding the Percent of a NumberFind 77% of 240.
First estimate. 77% ! 75% ! 3 _ 4 3 _ 4 " 240 ! 180
Use a decimal.Change the percent to a decimal. 77% ! 0.77
Multiply. 0.77 " 240 ! 184.8
The answer 184.8 is close to the estimate 180.
Use a proportion.
Write the percent as a fraction. 77% ! 77 ___ 100
Write the proportion and solve. x ___ 240 ! 77 ___ 100
100x ! 18,480
100x ____ 100 ! 18,480 _____ 100
x ! 184.8
Find the percent of each number.
1. 25% of 24 2. 50% of 72 3. 72% of 88
4. 18% of 97 5. 66% of 843 6. 46% of 388
7. 89% of 111 8. 0.7% of 392 9. 110% of 640
10. Geometry Ava’s aquarium is 10 in. tall, 15 in. long, and 8 in. wide. The aquarium is 95% filled with water. How many cubic inches of water are in the aquarium?
11. DeWayne used his music club membership card to get 15% off the cost of a CD. If the regular price of the CD was $15.95, how much did DeWayne pay?
12. Marla bought a dress for $89.99. She paid 6.5% sales tax. What was the total cost of the dress?
13. Writing to Explain Tell how you could use a proportion to find 138% of 967. Why is the solution greater than the original number?
6 36 63.36 17.46 556.38 178.48 98.79 2.744 704
1,140 in.3
$13.56
$95.84
x ___ 967 ! 138 ___ 100 . Then, I would cross-multiply: 100x ! 133,446. Then I can divide both sides by 100 to find the number: x ! 1334.46. The solution is greater than the original number because the percent is greater than 100.
I would usea proportion:
30429_T14_50-55.indd 53 3/4/08 11:41:12 AM
