On Thursday, there were 40 more adults than children at the funfair. On Friday, the number of adults increased by 85% and the number of children increased by 65%. There were 634 people on Friday. How many adults were there on Thursday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
+ 17 u |
+ 34 |
+ 13 u |
|
| After |
37 u |
+ 74 |
33 u |
634 |
85% =
85100 =
1720 85% x 40 =
1720 x 40 = 34
40 + 34 = 74
65% =
65100 =
1320 Total number of people on Friday
= 37 u + 74 + 33 u
= 70 u + 74
70 u + 74 = 634
70 u = 634 - 74
70 u = 560
1 u = 560 ÷ 70 = 8
Number of adults on Thursday
= 20 u + 40
= 20 x 8 + 40
= 160 + 40
= 200
Answer(s): 200
