On Tuesday, there were 20 more adults than children at the night market. On Wednesday, the number of adults increased by 65% and the number of children decreased by 55%. There were 159 people on Wednesday. How many children were there on Tuesday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
20 more |
|
|
| Before |
20 u |
+ 20 |
20 u |
|
| Change |
+ 13 u |
+ 13 |
- 11 u |
|
| After |
33 u |
+ 33 |
9 u |
159 |
65% =
65100 =
1320 65% x 20 =
1320 x 20 = 13
20 + 13 = 33
55% =
55100 =
1120 Total number of people on Wednesday
= 33 u + 33 + 9 u
= 42 u + 33
42 u + 33 = 159
42 u = 159 - 33
42 u = 126
1 u = 126 ÷ 42 = 3
Number of children on Tuesday
= 20 u
= 20 x 3
= 60
Answer(s): 60
