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Algebra Difficulty 1.1 Junior Find the answer Canada

Numbers $m$ and $n$ are on the number line, as shown.The value of $n-m$ is

Pick one

Solution

Since each of the five $1 \times 1$ squares has area 1, then the shaded area is 2. Since the total area is 5, the percentage that is shaded is $\frac{2}{5} = 0.4 = 40\%$ .

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project.