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McGraw-Hill Math Grade 7 Answer Key Lesson 15.3 Percents and Decimals
Exercises
CONVERT
Convert the decimals to a percentage. If the number is already a percentage, convert it to a decimal.
Question 1.
7% = _______________
Answer:
7% = 7/100 = 0.07
Explanation:
A percentage is displayed as decimal with a denominator of 100. Here 7% in decimal form as 0.07.
Question 2.
18.5% = _______________
Answer:
18.5% = 18.5/100 = 0.185
Explanation:
A percentage is displayed as decimal with a denominator of 100. Here 18.5% in decimal form as 0.185.
Question 3.
.33 = _______________
Answer:
0.33 = 33%
Explanation:
To convert decimals into percentages we need to move the decimal two places to the right. Then add a percent sign. The decimal 0.33 in percentage form as 33%.
Question 4.
.675 = _______________
Answer:
0.675 = 67.5%
Explanation:
To convert decimals into percentages we need to move the decimal two places to the right. Then add a percent sign. The decimal 0.675 in percentage form as 67.5%.
Question 5.
.3356 = _______________
Answer:
0.3356 = 33.56%
Explanation:
To convert decimals into percentages we need to move the decimal two places to the right. Then add a percent sign. The decimal 0.3356 in percentage form as 33.56%.
Question 6.
.01 % = _______________
Answer:
0.01% = 0.01/100 = 0.0001
Explanation:
A percentage is displayed as decimal with a denominator of 100. Here 0.01% in decimal form as 0.0001.
Question 7.
2.34% = _______________
Answer:
2.34% = 2.34/100 = 0.0234
Explanation:
A percentage is displayed as decimal with a denominator of 100. Here 2.34% in decimal form as 0.0234.
Question 8.
3.45 = _______________
Answer:
3.45 = 345%
Explanation:
To convert decimals into percentages we need to move the decimal two places to the right. Then add a percent sign. The decimal 3.45 in percentage form as 345%.
Question 9.
2.145 = _______________
Answer:
2.145 = 214.5%
Explanation:
To convert decimals into percentages we need to move the decimal two places to the right. Then add a percent sign. The decimal 2.145 in percentage form as 214.5%.
Question 10.
.3% = _______________
Answer:
0.3% = 0.3/100 = 0.003
Explanation:
A percentage is displayed as decimal with a denominator of 100. Here 0.3% in decimal form as 0.003.
Question 11.
33.29% = _______________
Answer:
33.29% = 0.3329
Explanation:
A percentage is displayed as decimal with a denominator of 100. Here 33.29% in decimal form as 0.3329.
Question 12.
2456 = _______________
Answer:
2456.00 = 245600%
Explanation:
To convert decimals into percentages we need to move the decimal two places to the right. Then add a percent sign. The decimal 2456.00 in percentage form as 245600%.
Question 13.
Taylor divided 6 shares of XYZ Corporation among 7 of her cousins. Each cousin received .8571 shares of XYZ stock. What percentage of a whole share did each cousin receive?
Answer:
Taylor divided 6 shares of XYZ Corporation among 7 of her cousins.
Each cousin received .8571 shares of XYZ stock.
0.8571 = 85.71%
To convert decimals into percentages we need to move the decimal two places to the right. Then add a percent sign. The decimal 0.8571 in percentage form as 85.71%.
Each cousin received 85.71% of a whole share.
Question 14.
Bill wants to take 15.43% of his earnings this year and put his money in his savings account. If Bill earned $100 this year, how much money will he put into his savings account?
Answer:
Bill wants to take 15.43% of his earnings this year and put his money in his savings account.
Bill earned $100 in this year.
15.43% x $100 = 0.1543 x $100 = $15.43
Bill will put $15.43 into his savings account.