On Wednesday, there were 40 more children than adults at the arcade. On Thursday, the number of children increased by 55% and the number of adults decreased by 65%. There were 404 people on Thursday. How many adults were there on Wednesday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
+ 11 u |
+ 22 |
- 13 u |
|
| After |
31 u |
+ 62 |
7 u |
404 |
55% =
55100 =
1120 55% x 40 =
1120 x 40 = 22
40 + 22 = 62
65% =
65100 =
1320 Total number of people on Thursday
= 31 u + 62 + 7 u
= 38 u + 62
38 u + 62 = 404
38 u = 404 - 62
38 u = 342
1 u = 342 ÷ 38 = 9
Number of adults on Wednesday
= 20 u
= 20 x 9
= 180
Answer(s): 180
