On Thursday, there were 40 more adults than children at the theme park. On Friday, the number of adults increased by 90% and the number of children increased by 70%. There were 328 people on Friday. How many adults were there on Thursday?
|
Adults |
Children |
Total |
Comparing adults and children at first |
40 more |
|
|
Before |
10 u |
+ 40 |
10 u |
|
Change |
+ 9 u |
+ 36 |
+ 7 u |
|
After |
19 u |
+ 76 |
17 u |
328 |
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 + 17 u
= 36 u + 76
36 u + 76 = 328
36 u = 328 - 76
36 u = 252
1 u = 252 ÷ 36 = 7
Number of adults on Thursday
= 10 u + 40
= 10 x 7 + 40
= 70 + 40
= 110
Answer(s): 110