On Tuesday, there were 40 more children than adults at the laser tag park. On Wednesday, the number of children increased by 80% and the number of adults increased by 60%. There were 242 people on Wednesday. How many children were there on Tuesday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
40 more |
|
|
| Before |
5 u |
+ 40 |
5 u |
|
| Change |
+ 4 u |
+ 32 |
+ 3 u |
|
| After |
9 u |
+ 72 |
8 u |
242 |
80% =
80100 =
45 80% x 40 =
45 x 40 = 32
40 + 32 = 72
60% =
60100 =
35 Total number of people on Wednesday
= 9 u + 72 + 8 u
= 17 u + 72
17 u + 72 = 242
17 u = 242 - 72
17 u = 170
1 u = 170 ÷ 17 = 10
Number of children on Tuesday
= 5 u + 40
= 5 x 10 + 40
= 50 + 40
= 90
Answer(s): 90
