On Saturday, there were 20 more children than adults at the arcade. On Sunday, the number of children decreased by 85% and the number of adults decreased by 65%. There were 73 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 |
- 17 u |
- 17 |
- 13 u |
|
| After |
3 u |
+ 3 |
7 u |
73 |
85% =
85100 =
1720 85% x 20 =
1720 x 20 = 17
20 - 17 = 3
65% =
65100 =
1320 Total number of people on Sunday
= 3 u + 3 + 7 u
= 10 u + 3
10 u + 3 = 73
10 u = 73 - 3
10 u = 70
1 u = 70 ÷ 10 = 7
Number of children on Sunday
= 3 u + 3
= 3 x 7 + 3
= 21 + 3
= 24
Answer(s): 24
