On Wednesday, there were 40 more children than adults at the laser tag park. On Thursday, the number of children increased by 70% and the number of adults decreased by 90%. There were 176 people on Thursday. How many adults were there on Wednesday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
40 more |
|
|
| Before |
10 u |
+ 40 |
10 u |
|
| Change |
+ 7 u |
+ 28 |
- 9 u |
|
| After |
17 u |
+ 68 |
1 u |
176 |
70% =
70100 =
710 70% x 40 =
710 x 40 = 28
40 + 28 = 68
90% =
90100 =
910 Total number of people on Thursday
= 17 u + 68 + 1 u
= 18 u + 68
18 u + 68 = 176
18 u = 176 - 68
18 u = 108
1 u = 108 ÷ 18 = 6
Number of adults on Wednesday
= 10 u
= 10 x 6
= 60
Answer(s): 60
