On Wednesday, there were 20 more children than adults at the fair. On Thursday, the number of children increased by 85% and the number of adults increased by 55%. There were 173 people on Thursday. How many children were there on Wednesday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
20 more |
|
|
| Before |
20 u |
+ 20 |
20 u |
|
| Change |
+ 17 u |
+ 17 |
+ 11 u |
|
| After |
37 u |
+ 37 |
31 u |
173 |
85% =
85100 =
1720 85% x 20 =
1720 x 20 = 17
20 + 17 = 37
55% =
55100 =
1120 Total number of people on Thursday
= 37 u + 37 + 31 u
= 68 u + 37
68 u + 37 = 173
68 u = 173 - 37
68 u = 136
1 u = 136 ÷ 68 = 2
Number of children on Wednesday
= 20 u + 20
= 20 x 2 + 20
= 40 + 20
= 60
Answer(s): 60
