On Wednesday, there were 20 more adults than children at the laser tag park. On Thursday, the number of adults decreased by 55% and the number of children decreased by 85%. There were 105 people on Thursday. How many adults were there on Thursday?
|
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 |
105 |
55% =
55100 =
1120 55% x 20 =
1120 x 20 = 11
20 - 11 = 9
85% =
85100 =
1720 Total number of people on Thursday
= 9 u + 9 + 3 u
= 12 u + 9
12 u + 9 = 105
12 u = 105 - 9
12 u = 96
1 u = 96 ÷ 12 = 8
Number of adults on Thursday
= 9 u + 9
= 9 x 8 + 9
= 72 + 9
= 81
Answer(s): 81