On Thursday, there were 35 more adults than children at the laser tag park. On Friday, the number of adults decreased by 80% and the number of children decreased by 60%. There were 40 people on Friday. How many adults were there on Friday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
35 more |
|
|
| Before |
5 u |
+ 35 |
5 u |
|
| Change |
- 4 u |
- 28 |
- 3 u |
|
| After |
1 u |
+ 7 |
2 u |
40 |
80% =
80100 =
45 80% x 35 =
45 x 35 = 28
35 - 28 = 7
60% =
60100 =
35 Total number of people on Friday
= 1 u + 7 + 2 u
= 3 u + 7
3 u + 7 = 40
3 u = 40 - 7
3 u = 33
1 u = 33 ÷ 3 = 11
Number of adults on Friday
= 1 u + 7
= 1 x 11 + 7
= 11 + 7
= 18
Answer(s): 18
