On Monday, there were 40 more children than adults at the bowling alley. On Tuesday, the number of children increased by 65% and the number of adults increased by 85%. There were 766 people on Tuesday. How many children were there on Monday?
|
Children |
Adults |
Total |
Comparing children and adults at first |
40 more |
|
|
Before |
20 u |
+ 40 |
20 u |
|
Change |
+ 13 u |
+ 26 |
+ 17 u |
|
After |
33 u |
+ 66 |
37 u |
766 |
65% =
65100 =
1320 65% x 40 =
1320 x 40 = 26
40 + 26 = 66
85% =
85100 =
1720 Total number of people on Tuesday
= 33 u + 66 + 37 u
= 70 u + 66
70 u + 66 = 766
70 u = 766 - 66
70 u = 700
1 u = 700 ÷ 70 = 10
Number of children on Monday
= 20 u + 40
= 20 x 10 + 40
= 200 + 40
= 240
Answer(s): 240