Answer:
smallest part is 45
Explanation:
sum the parts of the ratio , 5 + 3 = 8 parts
divide 120 by 8 to find the value of one part of the ratio
120 ÷ 8 = 15 , then
5 parts = 5 × 15 = 75
3 parts = 3 × 15 = 45
the smallest part is 45
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