On Wednesday, there were 40 more adults than children at the bowling alley. On Thursday, the number of adults decreased by 65% and the number of children decreased by 55%. There were 78 people on Thursday. How many adults were there on Thursday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
40 more |
|
|
| Before |
20 u |
+ 40 |
20 u |
|
| Change |
- 13 u |
- 26 |
- 11 u |
|
| After |
7 u |
+ 14 |
9 u |
78 |
65% =
65100 =
1320 65% x 40 =
1320 x 40 = 26
40 - 26 = 14
55% =
55100 =
1120 Total number of people on Thursday
= 7 u + 14 + 9 u
= 16 u + 14
16 u + 14 = 78
16 u = 78 - 14
16 u = 64
1 u = 64 ÷ 16 = 4
Number of adults on Thursday
= 7 u + 14
= 7 x 4 + 14
= 28 + 14
= 42
Answer(s): 42
