On Friday, there were 20 more adults than children at the funfair. On Saturday, the number of adults increased by 55% and the number of children increased by 85%. There were 303 people on Saturday. How many adults were there on Friday?
|
Adults |
Children |
Total |
Comparing adults and children at first |
20 more |
|
|
Before |
20 u |
+ 20 |
20 u |
|
Change |
+ 11 u |
+ 11 |
+ 17 u |
|
After |
31 u |
+ 31 |
37 u |
303 |
55% =
55100 =
1120 55% x 20 =
1120 x 20 = 11
20 + 11 = 31
85% =
85100 =
1720 Total number of people on Saturday
= 31 u + 31 + 37 u
= 68 u + 31
68 u + 31 = 303
68 u = 303 - 31
68 u = 272
1 u = 272 ÷ 68 = 4
Number of adults on Friday
= 20 u + 20
= 20 x 4 + 20
= 80 + 20
= 100
Answer(s): 100