On Monday, there were 15 more children than adults at the arcade. On Tuesday, the number of children decreased by 80% and the number of adults decreased by 60%. There were 27 people on Tuesday. How many children were there on Tuesday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
15 more |
|
|
| Before |
5 u |
+ 15 |
5 u |
|
| Change |
- 4 u |
- 12 |
- 3 u |
|
| After |
1 u |
+ 3 |
2 u |
27 |
80% =
80100 =
45 80% x 15 =
45 x 15 = 12
15 - 12 = 3
60% =
60100 =
35 Total number of people on Tuesday
= 1 u + 3 + 2 u
= 3 u + 3
3 u + 3 = 27
3 u = 27 - 3
3 u = 24
1 u = 24 ÷ 3 = 8
Number of children on Tuesday
= 1 u + 3
= 1 x 8 + 3
= 8 + 3
= 11
Answer(s): 11
