On Thursday, there were 40 more adults than children at the arcade. On Friday, the number of adults decreased by 65% and the number of children decreased by 85%. There were 134 people on Friday. How many adults were there on Friday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
- 13 u |
- 26 |
- 17 u |
|
| After |
7 u |
+ 14 |
3 u |
134 |
65% =
65100 =
1320 65% x 40 =
1320 x 40 = 26
40 - 26 = 14
85% =
85100 =
1720 Total number of people on Friday
= 7 u + 14 + 3 u
= 10 u + 14
10 u + 14 = 134
10 u = 134 - 14
10 u = 120
1 u = 120 ÷ 10 = 12
Number of adults on Friday
= 7 u + 14
= 7 x 12 + 14
= 84 + 14
= 98
Answer(s): 98
