On Monday, there were 30 more adults than children at the laser tag park. On Tuesday, the number of adults decreased by 60% and the number of children decreased by 80%. There were 30 people on Tuesday. How many adults were there on Tuesday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
30 more |
|
|
| Before |
5 u |
+ 30 |
5 u |
|
| Change |
- 3 u |
- 18 |
- 4 u |
|
| After |
2 u |
+ 12 |
1 u |
30 |
60% =
60100 =
35 60% x 30 =
35 x 30 = 18
30 - 18 = 12
80% =
80100 =
45 Total number of people on Tuesday
= 2 u + 12 + 1 u
= 3 u + 12
3 u + 12 = 30
3 u = 30 - 12
3 u = 18
1 u = 18 ÷ 3 = 6
Number of adults on Tuesday
= 2 u + 12
= 2 x 6 + 12
= 12 + 12
= 24
Answer(s): 24
