On Saturday, there were 40 more children than adults at the night market. On Sunday, the number of children increased by 55% and the number of adults decreased by 85%. There were 164 people on Sunday. How many adults were there on Saturday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
+ 11 u |
+ 22 |
- 17 u |
|
| After |
31 u |
+ 62 |
3 u |
164 |
55% =
55100 =
1120 55% x 40 =
1120 x 40 = 22
40 + 22 = 62
85% =
85100 =
1720 Total number of people on Sunday
= 31 u + 62 + 3 u
= 34 u + 62
34 u + 62 = 164
34 u = 164 - 62
34 u = 102
1 u = 102 ÷ 34 = 3
Number of adults on Saturday
= 20 u
= 20 x 3
= 60
Answer(s): 60
