WHAT PERCENT?
THE METHOD OF PROPORTIONS
PROBLEMS (2)
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Do the problem yourself first!
17. Frequent percents. The student should know the percent
17. equivalent of the following.
| 17. a) |
1
2 |
= 50% |
|
b) |
1
3 |
= 33 |
1
3 |
% |
|
c) |
2
3 |
= 66 |
2
3 |
% |
| 17. d) |
1
4 |
= 25%
| |
e) |
3
4 |
= 75% |
|
f) |
1
8 |
= 12½% |
| 17. g) |
1
5 |
= 20% |
|
h) |
2
5 |
= 40% |
|
i) |
3
5 |
= 60% |
|
j) |
4
5 |
= 80% |
| 17. k) |
1
10 |
= 10% |
|
l) |
3
10 |
= 30% |
|
m) |
7
10 |
= 70% |
|
n) |
9
10 |
= 90% |
| 17. o) |
1
100 |
= 1% |
|
p) |
2
100 |
= 2% |
|
q) |
21
100 |
= 21% |
|
r) |
99
100 |
= 99% |
18. Write the fraction in lowest terms or the whole number or the
18. mixed number that corresponds to each of the following.
| a) 12 is what percent of 18? |
2
3 |
| a) Now answer that question.
66 |
2
3 |
%
|
| b) What percent of 60 is 12? |
1
5 |
| b) Now answer that question.
20%
|
| c) What percent of 20 is 15? |
3
4 |
| b) Now answer that question.
75%
|
| d) 15 is what percent of 50? |
3
10 |
| b) Now answer that question.
30%
|
| e) What percent of 9 is 18? |
2 |
| b) Now answer that question.
200%
|
| f) 27 is what percent of 18? |
3
2 |
| f) Now answer that question.
150%
|
| g) 12 is what percent of 4? |
3 |
| f) Now answer that question.
300%
|
| h) 30 is what percent of 12? |
2½ |
| f) Now answer that question.
250%
|
| i) What percent of 8 is 42? |
5¼ |
| i) Now answer that question.
525%
|
| j) What percent of 6 is 26? |
4 |
1
3 |
| j) Now answer that question.
433
| 1
3 |
% |
19. Clearing of decimals
| |
a) .2 is what percent of 5? 4% |
| |
| |
b) 1.5 is what percent of 2? 75% |
| |
| |
c) 2 is what percent of 2.5? 80% |
| |
| |
d) What percent of 5 is 7.5? 150% |
| |
| |
e) What percent of 2 is 2.5? 125% |
| |
| |
f) What percent of 4 is .5? 12.5% |
| 20. With a calculator, how do we interpret the fraction |
Amount
Base |
? |
Amount ÷ Base
21. Calculator problem. Express each fraction as a percent. Round
21. off to one decimal place.
| 21. a) |
14
15 |
= 93.3% |
|
b) |
15
14 |
= 107.1% |
|
c) |
1
11 |
= 9.1% |
Continue on to the next Lesson.
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