On Tuesday, there were 20 more adults than children at the funfair. On Wednesday, the number of adults increased by 60% and the number of children increased by 80%. There were 83 people on Wednesday. How many adults were there on Tuesday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
20 more |
|
|
| Before |
5 u |
+ 20 |
5 u |
|
| Change |
+ 3 u |
+ 12 |
+ 4 u |
|
| After |
8 u |
+ 32 |
9 u |
83 |
60% =
60100 =
35 60% x 20 =
35 x 20 = 12
20 + 12 = 32
80% =
80100 =
45 Total number of people on Wednesday
= 8 u + 32 + 9 u
= 17 u + 32
17 u + 32 = 83
17 u = 83 - 32
17 u = 51
1 u = 51 ÷ 17 = 3
Number of adults on Tuesday
= 5 u + 20
= 5 x 3 + 20
= 15 + 20
= 35
Answer(s): 35
