On Saturday, there were 20 more children than adults at the funfair. On Sunday, the number of children increased by 55% and the number of adults decreased by 65%. There were 297 people on Sunday. How many adults were there on Saturday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
20 more |
|
|
| Before |
20 u |
+ 20 |
20 u |
|
| Change |
+ 11 u |
+ 11 |
- 13 u |
|
| After |
31 u |
+ 31 |
7 u |
297 |
55% =
55100 =
1120 55% x 20 =
1120 x 20 = 11
20 + 11 = 31
65% =
65100 =
1320 Total number of people on Sunday
= 31 u + 31 + 7 u
= 38 u + 31
38 u + 31 = 297
38 u = 297 - 31
38 u = 266
1 u = 266 ÷ 38 = 7
Number of adults on Saturday
= 20 u
= 20 x 7
= 140
Answer(s): 140
