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Four fifths of a pitcher is filled with pineapple juice. The pitcher is emptied by pouring an equal amount of juice into each of 10 cups. What percent of the total capacity of the pitcher did each cup receive?~ (adapted from 2020 AMC 8, Question \#5) 
Overseas Competition->Knowledge Point->Calculation Modules->Percentage Calculation
The pitcher is $\frac{4}{5}$ full, i.e. $80 \textbackslash\%$ full. Therefore each cup receives $\frac{80}{10}=(\mathbf{C}) 8$ percent of the total capacity. 