On Monday, there were 40 more adults than children at the night market. On Tuesday, the number of adults increased by 85% and the number of children decreased by 55%. There were 350 people on Tuesday. How many children were there on Monday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
+ 17 u |
+ 34 |
- 11 u |
|
| After |
37 u |
+ 74 |
9 u |
350 |
85% =
85100 =
1720 85% x 40 =
1720 x 40 = 34
40 + 34 = 74
55% =
55100 =
1120 Total number of people on Tuesday
= 37 u + 74 + 9 u
= 46 u + 74
46 u + 74 = 350
46 u = 350 - 74
46 u = 276
1 u = 276 ÷ 46 = 6
Number of children on Monday
= 20 u
= 20 x 6
= 120
Answer(s): 120
