On Wednesday, there were 40 more adults than children at the trampoline park. On Thursday, the number of adults increased by 85% and the number of children increased by 55%. There were 686 people on Thursday. How many adults were there on Wednesday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
+ 17 u |
+ 34 |
+ 11 u |
|
| After |
37 u |
+ 74 |
31 u |
686 |
85% =
85100 =
1720 85% x 40 =
1720 x 40 = 34
40 + 34 = 74
55% =
55100 =
1120 Total number of people on Thursday
= 37 u + 74 + 31 u
= 68 u + 74
68 u + 74 = 686
68 u = 686 - 74
68 u = 612
1 u = 612 ÷ 68 = 9
Number of adults on Wednesday
= 20 u + 40
= 20 x 9 + 40
= 180 + 40
= 220
Answer(s): 220
