Answer:
She should buy 7 cans of soup
Explanation:
We can use proportions to solve this problem. Put the cans of soup over the people.
24 cans x cans
-------------- = --------------
96 people 28 people
Cross multiple
24*28 = 96*x
672=96x
Divide by 96 on each side
672/96 =96x/96
7=x
She should buy 7 cans of soup