On Tuesday, there were 40 more adults than children at the trampoline park. On Wednesday, the number of adults increased by 60% and the number of children decreased by 80%. There were 172 people on Wednesday. How many children were there on Tuesday?
|
Adults |
Children |
Total |
Comparing adults and children at first |
40 more |
|
|
Before |
5 u |
+ 40 |
5 u |
|
Change |
+ 3 u |
+ 24 |
- 4 u |
|
After |
8 u |
+ 64 |
1 u |
172 |
60% =
60100 =
35 60% x 40 =
35 x 40 = 24
40 + 24 = 64
80% =
80100 =
45 Total number of people on Wednesday
= 8 u + 64 + 1 u
= 9 u + 64
9 u + 64 = 172
9 u = 172 - 64
9 u = 108
1 u = 108 ÷ 9 = 12
Number of children on Tuesday
= 5 u
= 5 x 12
= 60
Answer(s): 60