On Wednesday, there were 10 more children than adults at the theme park. On Thursday, the number of children increased by 70% and the number of adults increased by 90%. There were 233 people on Thursday. How many children were there on Wednesday?
|
Children |
Adults |
Total |
Comparing children and adults at first |
10 more |
|
|
Before |
10 u |
+ 10 |
10 u |
|
Change |
+ 7 u |
+ 7 |
+ 9 u |
|
After |
17 u |
+ 17 |
19 u |
233 |
70% =
70100 =
710 70% x 10 =
710 x 10 = 7
10 + 7 = 17
90% =
90100 =
910 Total number of people on Thursday
= 17 u + 17 + 19 u
= 36 u + 17
36 u + 17 = 233
36 u = 233 - 17
36 u = 216
1 u = 216 ÷ 36 = 6
Number of children on Wednesday
= 10 u + 10
= 10 x 6 + 10
= 60 + 10
= 70
Answer(s): 70