On Friday, there were 20 more adults than children at the theme park. On Saturday, the number of adults increased by 55% and the number of children decreased by 85%. There were 439 people on Saturday. How many children were there on Friday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
20 more |
|
|
| Before |
20 u |
+ 20 |
20 u |
|
| Change |
+ 11 u |
+ 11 |
- 17 u |
|
| After |
31 u |
+ 31 |
3 u |
439 |
55% =
55100 =
1120 55% x 20 =
1120 x 20 = 11
20 + 11 = 31
85% =
85100 =
1720 Total number of people on Saturday
= 31 u + 31 + 3 u
= 34 u + 31
34 u + 31 = 439
34 u = 439 - 31
34 u = 408
1 u = 408 ÷ 34 = 12
Number of children on Friday
= 20 u
= 20 x 12
= 240
Answer(s): 240
