On Thursday, there were 30 more children than adults at the fair. On Friday, the number of children increased by 60% and the number of adults increased by 80%. There were 167 people on Friday. How many children were there on Thursday?
| |
Children |
Adults |
Total |
Comparing children
and adults at first |
30 more |
|
|
| Before |
5 u |
+ 30 |
5 u |
|
| Change |
+ 3 u |
+ 18 |
+ 4 u |
|
| After |
8 u |
+ 48 |
9 u |
167 |
60% =
60100 =
35 60% x 30 =
35 x 30 = 18
30 + 18 = 48
80% =
80100 =
45 Total number of people on Friday
= 8 u + 48 + 9 u
= 17 u + 48
17 u + 48 = 167
17 u = 167 - 48
17 u = 119
1 u = 119 ÷ 17 = 7
Number of children on Thursday
= 5 u + 30
= 5 x 7 + 30
= 35 + 30
= 65
Answer(s): 65
