change the mixed numbers to improper fractions
3 3/5 = (5*3+3)/5 =18/5
2 1/4 = (4*2+1)/4 = 9/4
18/5 divided by 9/4
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18/5 * 4/9
18/9 * 5/4 =
10/4
5/2
return to a mixed number
2 1/2
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