what is eight ninths of 45?

$$\frac{8}{9} \cdot \frac{45}{1}= 8 \cdot 5 = 40.$$ so the answer is 40.

$${\frac{{\frac{{\mathtt{8}}}{{\mathtt{9}}}}{\mathtt{\,\times\,}}{\mathtt{45}}}{{\mathtt{1}}}} = {\frac{{\mathtt{40}}}{{\mathtt{1}}}} = {\mathtt{40}}$$

DONE

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$${\frac{{\mathtt{45}}}{{\mathtt{9}}}}{\mathtt{\,\times\,}}{\mathtt{8}} = {\mathtt{40}}$$