On Wednesday, there were 20 more adults than children at the night market. On Thursday, the number of adults increased by 80% and the number of children increased by 60%. There were 155 people on Thursday. How many adults were there on Wednesday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
20 more |
|
|
| Before |
5 u |
+ 20 |
5 u |
|
| Change |
+ 4 u |
+ 16 |
+ 3 u |
|
| After |
9 u |
+ 36 |
8 u |
155 |
80% =
80100 =
45 80% x 20 =
45 x 20 = 16
20 + 16 = 36
60% =
60100 =
35 Total number of people on Thursday
= 9 u + 36 + 8 u
= 17 u + 36
17 u + 36 = 155
17 u = 155 - 36
17 u = 119
1 u = 119 ÷ 17 = 7
Number of adults on Wednesday
= 5 u + 20
= 5 x 7 + 20
= 35 + 20
= 55
Answer(s): 55
