Mowing lawn

Tara is mowing her lawn. She mows  3/5  of her 925-square-meter lawn before stopping to chat with a neighbor. How many square meters does Tara have left to mow after chatting with her neighbor?

Correct answer:

b =  370 m²

Step-by-step explanation:

$$\begin{gathered} S=925{\text{m}}^2 \\ a=\frac{3}{5}\cdot S=\frac{3}{5}\cdot 925=\frac{3\cdot 925}{5}=\frac{2775}{5}=555{\text{m}}^2 \\ b=S-a=925-555=370{\text{m}}^2 \end{gathered}$$

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