The ketchup

If 3 1/4 of tomatoes are needed to make 1 bottle of ketchup. Find the number of tomatoes required to make 4 1/5 bottles

Result

n =  13.65

Solution:

$n_{ 1 } = 3 + \dfrac{ 1 }{ 4 } = \dfrac{ 13 }{ 4 } = 3.25 \ \\ n_{ 2 } = 4 + \dfrac{ 1 }{ 5 } = \dfrac{ 21 }{ 5 } = 4.2 \ \\ \ \\ n = n_{ 1 } \cdot \ n_{ 2 } = 3.25 \cdot \ 4.2 = \dfrac{ 273 }{ 20 } = 13.65$

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