On Saturday, there were 10 more adults than children at the fair. On Sunday, the number of adults decreased by 60% and the number of children decreased by 80%. There were 28 people on Sunday. How many adults were there on Sunday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
10 more |
|
|
| Before |
5 u |
+ 10 |
5 u |
|
| Change |
- 3 u |
- 6 |
- 4 u |
|
| After |
2 u |
+ 4 |
1 u |
28 |
60% =
60100 =
35 60% x 10 =
35 x 10 = 6
10 - 6 = 4
80% =
80100 =
45 Total number of people on Sunday
= 2 u + 4 + 1 u
= 3 u + 4
3 u + 4 = 28
3 u = 28 - 4
3 u = 24
1 u = 24 ÷ 3 = 8
Number of adults on Sunday
= 2 u + 4
= 2 x 8 + 4
= 16 + 4
= 20
Answer(s): 20
