On Saturday, there were 40 more children than adults at the bowling alley. On Sunday, the number of children decreased by 85% and the number of adults decreased by 55%. There were 126 people on Sunday. How many children were there on Sunday?
|
Children |
Adults |
Total |
Comparing children and adults at first |
40 more |
|
|
Before |
20 u |
+ 40 |
20 u |
|
Change |
- 17 u |
- 34 |
- 11 u |
|
After |
3 u |
+ 6 |
9 u |
126 |
85% =
85100 =
1720 85% x 40 =
1720 x 40 = 34
40 - 34 = 6
55% =
55100 =
1120 Total number of people on Sunday
= 3 u + 6 + 9 u
= 12 u + 6
12 u + 6 = 126
12 u = 126 - 6
12 u = 120
1 u = 120 ÷ 12 = 10
Number of children on Sunday
= 3 u + 6
= 3 x 10 + 6
= 30 + 6
= 36
Answer(s): 36