On Thursday, there were 40 more children than adults at the laser tag park. On Friday, the number of children decreased by 55% and the number of adults decreased by 65%. There were 66 people on Friday. How many children were there on Friday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
- 11 u |
- 22 |
- 13 u |
|
| After |
9 u |
+ 18 |
7 u |
66 |
55% =
55100 =
1120 55% x 40 =
1120 x 40 = 22
40 - 22 = 18
65% =
65100 =
1320 Total number of people on Friday
= 9 u + 18 + 7 u
= 16 u + 18
16 u + 18 = 66
16 u = 66 - 18
16 u = 48
1 u = 48 ÷ 16 = 3
Number of children on Friday
= 9 u + 18
= 9 x 3 + 18
= 27 + 18
= 45
Answer(s): 45
