On Tuesday, there were 40 more adults than children at the night market. On Wednesday, the number of adults increased by 70% and the number of children increased by 90%. There were 392 people on Wednesday. How many adults were there on Tuesday?
| |
Adults |
Children |
Total |
Comparing adults
and children at first |
40 more |
|
|
| Before |
10 u |
+ 40 |
10 u |
|
| Change |
+ 7 u |
+ 28 |
+ 9 u |
|
| After |
17 u |
+ 68 |
19 u |
392 |
70% =
70100 =
710 70% x 40 =
710 x 40 = 28
40 + 28 = 68
90% =
90100 =
910 Total number of people on Wednesday
= 17 u + 68 + 19 u
= 36 u + 68
36 u + 68 = 392
36 u = 392 - 68
36 u = 324
1 u = 324 ÷ 36 = 9
Number of adults on Tuesday
= 10 u + 40
= 10 x 9 + 40
= 90 + 40
= 130
Answer(s): 130
