On Thursday, there were 40 more children than adults at the arcade. On Friday, the number of children increased by 90% and the number of adults decreased by 70%. There were 296 people on Friday. How many adults were there on Thursday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
40 more |
|
|
| Before |
10 u |
+ 40 |
10 u |
|
| Change |
+ 9 u |
+ 36 |
- 7 u |
|
| After |
19 u |
+ 76 |
3 u |
296 |
90% =
90100 =
910 90% x 40 =
910 x 40 = 36
40 + 36 = 76
70% =
70100 =
710 Total number of people on Friday
= 19 u + 76 + 3 u
= 22 u + 76
22 u + 76 = 296
22 u = 296 - 76
22 u = 220
1 u = 220 ÷ 22 = 10
Number of adults on Thursday
= 10 u
= 10 x 10
= 100
Answer(s): 100
