On Thursday, there were 35 more children than adults at the bowling alley. On Friday, the number of children decreased by 60% and the number of adults decreased by 80%. There were 47 people on Friday. How many children were there on Friday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
35 more |
|
|
| Before |
5 u |
+ 35 |
5 u |
|
| Change |
- 3 u |
- 21 |
- 4 u |
|
| After |
2 u |
+ 14 |
1 u |
47 |
60% =
60100 =
35 60% x 35 =
35 x 35 = 21
35 - 21 = 14
80% =
80100 =
45 Total number of people on Friday
= 2 u + 14 + 1 u
= 3 u + 14
3 u + 14 = 47
3 u = 47 - 14
3 u = 33
1 u = 33 ÷ 3 = 11
Number of children on Friday
= 2 u + 14
= 2 x 11 + 14
= 22 + 14
= 36
Answer(s): 36
