On Friday, there were 40 more adults than children at the night market. On Saturday, the number of adults increased by 60% and the number of children increased by 80%. There were 200 people on Saturday. How many adults were there on Friday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
40 more |
|
|
| Before |
5 u |
+ 40 |
5 u |
|
| Change |
+ 3 u |
+ 24 |
+ 4 u |
|
| After |
8 u |
+ 64 |
9 u |
200 |
60% =
60100 =
35 60% x 40 =
35 x 40 = 24
40 + 24 = 64
80% =
80100 =
45 Total number of people on Saturday
= 8 u + 64 + 9 u
= 17 u + 64
17 u + 64 = 200
17 u = 200 - 64
17 u = 136
1 u = 136 ÷ 17 = 8
Number of adults on Friday
= 5 u + 40
= 5 x 8 + 40
= 40 + 40
= 80
Answer(s): 80
