On Thursday, there were 20 more children than adults at the fair. On Friday, the number of children decreased by 55% and the number of adults decreased by 65%. There were 73 people on Friday. How many children were there on Friday?
| |
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 |
73 |
55% =
55100 =
1120 55% x 20 =
1120 x 20 = 11
20 - 11 = 9
65% =
65100 =
1320 Total number of people on Friday
= 9 u + 9 + 7 u
= 16 u + 9
16 u + 9 = 73
16 u = 73 - 9
16 u = 64
1 u = 64 ÷ 16 = 4
Number of children on Friday
= 9 u + 9
= 9 x 4 + 9
= 36 + 9
= 45
Answer(s): 45
