On Saturday, there were 20 more children than adults at the funfair. On Sunday, the number of children decreased by 55% and the number of adults decreased by 65%. There were 121 people on Sunday. How many children were there on Sunday?
|
Children |
Adults |
Total |
Comparing children and adults at first |
20 more |
|
|
Before |
20 u |
+ 20 |
20 u |
|
Change |
- 11 u |
- 11 |
- 13 u |
|
After |
9 u |
+ 9 |
7 u |
121 |
55% =
55100 =
1120 55% x 20 =
1120 x 20 = 11
20 - 11 = 9
65% =
65100 =
1320 Total number of people on Sunday
= 9 u + 9 + 7 u
= 16 u + 9
16 u + 9 = 121
16 u = 121 - 9
16 u = 112
1 u = 112 ÷ 16 = 7
Number of children on Sunday
= 9 u + 9
= 9 x 7 + 9
= 63 + 9
= 72
Answer(s): 72