On Tuesday, there were 40 more children than adults at the bowling alley. On Wednesday, the number of children decreased by 60% and the number of adults decreased by 80%. There were 25 people on Wednesday. How many children were there on Wednesday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
40 more |
|
|
| Before |
5 u |
+ 40 |
5 u |
|
| Change |
- 3 u |
- 24 |
- 4 u |
|
| After |
2 u |
+ 16 |
1 u |
25 |
60% =
60100 =
35 60% x 40 =
35 x 40 = 24
40 - 24 = 16
80% =
80100 =
45 Total number of people on Wednesday
= 2 u + 16 + 1 u
= 3 u + 16
3 u + 16 = 25
3 u = 25 - 16
3 u = 9
1 u = 9 ÷ 3 = 3
Number of children on Wednesday
= 2 u + 16
= 2 x 3 + 16
= 6 + 16
= 22
Answer(s): 22
