On Saturday, there were 20 more adults than children at the theme park. On Sunday, the number of adults decreased by 55% and the number of children decreased by 85%. There were 69 people on Sunday. How many adults were there on Sunday?
|
Adults |
Children |
Total |
Comparing adults and children at first |
20 more |
|
|
Before |
20 u |
+ 20 |
20 u |
|
Change |
- 11 u |
- 11 |
- 17 u |
|
After |
9 u |
+ 9 |
3 u |
69 |
55% =
55100 =
1120 55% x 20 =
1120 x 20 = 11
20 - 11 = 9
85% =
85100 =
1720 Total number of people on Sunday
= 9 u + 9 + 3 u
= 12 u + 9
12 u + 9 = 69
12 u = 69 - 9
12 u = 60
1 u = 60 ÷ 12 = 5
Number of adults on Sunday
= 9 u + 9
= 9 x 5 + 9
= 45 + 9
= 54
Answer(s): 54