On Wednesday, there were 25 more children than adults at the theme park. On Thursday, the number of children increased by 60% and the number of adults increased by 80%. There were 142 people on Thursday. How many children were there on Wednesday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
25 more |
|
|
| Before |
5 u |
+ 25 |
5 u |
|
| Change |
+ 3 u |
+ 15 |
+ 4 u |
|
| After |
8 u |
+ 40 |
9 u |
142 |
60% =
60100 =
35 60% x 25 =
35 x 25 = 15
25 + 15 = 40
80% =
80100 =
45 Total number of people on Thursday
= 8 u + 40 + 9 u
= 17 u + 40
17 u + 40 = 142
17 u = 142 - 40
17 u = 102
1 u = 102 ÷ 17 = 6
Number of children on Wednesday
= 5 u + 25
= 5 x 6 + 25
= 30 + 25
= 55
Answer(s): 55
