On Friday, there were 20 more adults than children at the laser tag park. On Saturday, the number of adults decreased by 55% and the number of children decreased by 65%. There were 169 people on Saturday. How many adults were there on Saturday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
20 more |
|
|
| Before |
20 u |
+ 20 |
20 u |
|
| Change |
- 11 u |
- 11 |
- 13 u |
|
| After |
9 u |
+ 9 |
7 u |
169 |
55% =
55100 =
1120 55% x 20 =
1120 x 20 = 11
20 - 11 = 9
65% =
65100 =
1320 Total number of people on Saturday
= 9 u + 9 + 7 u
= 16 u + 9
16 u + 9 = 169
16 u = 169 - 9
16 u = 160
1 u = 160 ÷ 16 = 10
Number of adults on Saturday
= 9 u + 9
= 9 x 10 + 9
= 90 + 9
= 99
Answer(s): 99
