Basically, It's just adding fractions. 3/8 and 4/8 both have the same denominator, so you don't need to change the fractions to match the same denominator. 4/8 + 3/8 = 4 + 3 = 7 = 7/8
There you go, the answer is 7/8
Hope this helps :)
7/8 is how much he buys
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