'<em>Option B' </em><em>is the correct answer....</em>
540/3=180
Ashley ran at 180 metres per minute.
480/2= 240
Grace ran at 240 metres per minute.
It is 9/16 because 2 1/4 equals 9/4 and 9/4x1/4 equals 9/16
Each group will have the same number of boys and girls in a group. Find common factors for the number of boys and girls.
6th grade :
64 girls = 8 * 8
72 boys = 8 * 9
There will be 8 groups consisting of 8 girls and 9 boys
7th grade :
81 girls = 9 * 9
63 boys = 9 * 7
There will be 9 groups consisting of 9 girls and 7 boys
8th grade :
68 girls = 4 * 17
60 boys = 4 * 12
There will be 4 groups consisting of 17 girls and 12 boys