The building

Forty-five people live in the building. Three-fifths are men, and two-fifths are women. Find the number of men and women in the building.

Correct answer:

w =  18
m =  27

Step-by-step explanation:

$$\begin{gathered} n=45 \\ w=\frac{2}{5}\cdot n=\frac{2}{5}\cdot 45=\frac{2\cdot 45}{5}=\frac{90}{5}=18 \end{gathered}$$

$m=\frac{3}{5}\cdot n=\frac{3}{5}\cdot 45=\frac{3\cdot 45}{5}=\frac{135}{5}=27$

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