On Friday, there were 40 more adults than children at the night market. On Saturday, the number of adults increased by 55% and the number of children decreased by 85%. There were 130 people on Saturday. How many children were there on Friday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
+ 11 u |
+ 22 |
- 17 u |
|
| After |
31 u |
+ 62 |
3 u |
130 |
55% =
55100 =
1120 55% x 40 =
1120 x 40 = 22
40 + 22 = 62
85% =
85100 =
1720 Total number of people on Saturday
= 31 u + 62 + 3 u
= 34 u + 62
34 u + 62 = 130
34 u = 130 - 62
34 u = 68
1 u = 68 ÷ 34 = 2
Number of children on Friday
= 20 u
= 20 x 2
= 40
Answer(s): 40
