On Monday, there were 20 more adults than children at the arcade. On Tuesday, the number of adults decreased by 65% and the number of children decreased by 85%. There were 127 people on Tuesday. How many adults were there on Tuesday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
20 more |
|
|
| Before |
20 u |
+ 20 |
20 u |
|
| Change |
- 13 u |
- 13 |
- 17 u |
|
| After |
7 u |
+ 7 |
3 u |
127 |
65% =
65100 =
1320 65% x 20 =
1320 x 20 = 13
20 - 13 = 7
85% =
85100 =
1720 Total number of people on Tuesday
= 7 u + 7 + 3 u
= 10 u + 7
10 u + 7 = 127
10 u = 127 - 7
10 u = 120
1 u = 120 ÷ 10 = 12
Number of adults on Tuesday
= 7 u + 7
= 7 x 12 + 7
= 84 + 7
= 91
Answer(s): 91
