On Friday, there were 40 more adults than children at the fair. On Saturday, the number of adults increased by 55% and the number of children decreased by 65%. There were 252 people on Saturday. How many children were there on Friday?
|
Adults |
Children |
Total |
Comparing adults and children at first |
40 more |
|
|
Before |
20 u |
+ 40 |
20 u |
|
Change |
+ 11 u |
+ 22 |
- 13 u |
|
After |
31 u |
+ 62 |
7 u |
252 |
55% =
55100 =
1120 55% x 40 =
1120 x 40 = 22
40 + 22 = 62
65% =
65100 =
1320 Total number of people on Saturday
= 31 u + 62 + 7 u
= 38 u + 62
38 u + 62 = 252
38 u = 252 - 62
38 u = 190
1 u = 190 ÷ 38 = 5
Number of children on Friday
= 20 u
= 20 x 5
= 100
Answer(s): 100