On Tuesday, there were 40 more children than adults at the laser tag park. On Wednesday, the number of children increased by 65% and the number of adults decreased by 55%. There were 192 people on Wednesday. How many adults were there on Tuesday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
+ 13 u |
+ 26 |
- 11 u |
|
| After |
33 u |
+ 66 |
9 u |
192 |
65% =
65100 =
1320 65% x 40 =
1320 x 40 = 26
40 + 26 = 66
55% =
55100 =
1120 Total number of people on Wednesday
= 33 u + 66 + 9 u
= 42 u + 66
42 u + 66 = 192
42 u = 192 - 66
42 u = 126
1 u = 126 ÷ 42 = 3
Number of adults on Tuesday
= 20 u
= 20 x 3
= 60
Answer(s): 60
