On Monday, there were 30 more adults than children at the theme park. On Tuesday, the number of adults increased by 80% and the number of children decreased by 60%. There were 153 people on Tuesday. How many children were there on Monday?
|
Adults |
Children |
Total |
Comparing adults and children at first |
30 more |
|
|
Before |
5 u |
+ 30 |
5 u |
|
Change |
+ 4 u |
+ 24 |
- 3 u |
|
After |
9 u |
+ 54 |
2 u |
153 |
80% =
80100 =
45 80% x 30 =
45 x 30 = 24
30 + 24 = 54
60% =
60100 =
35 Total number of people on Tuesday
= 9 u + 54 + 2 u
= 11 u + 54
11 u + 54 = 153
11 u = 153 - 54
11 u = 99
1 u = 99 ÷ 11 = 9
Number of children on Monday
= 5 u
= 5 x 9
= 45
Answer(s): 45