On Thursday, there were 40 more children than adults at the funfair. On Friday, the number of children increased by 85% and the number of adults increased by 55%. There were 618 people on Friday. How many children were there on Thursday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
+ 17 u |
+ 34 |
+ 11 u |
|
| After |
37 u |
+ 74 |
31 u |
618 |
85% =
85100 =
1720 85% x 40 =
1720 x 40 = 34
40 + 34 = 74
55% =
55100 =
1120 Total number of people on Friday
= 37 u + 74 + 31 u
= 68 u + 74
68 u + 74 = 618
68 u = 618 - 74
68 u = 544
1 u = 544 ÷ 68 = 8
Number of children on Thursday
= 20 u + 40
= 20 x 8 + 40
= 160 + 40
= 200
Answer(s): 200
