$$2\frac{1}{7}-\frac{7}{15}\div\frac{7}{45}\times\frac{2}{7}$$
$\frac{9}{7}\approx 1.285714286$
$$\frac{14+1}{7}-\frac{\frac{7}{15}}{\frac{7}{45}}\times \frac{2}{7}$$
$$\frac{15}{7}-\frac{\frac{7}{15}}{\frac{7}{45}}\times \frac{2}{7}$$
$$\frac{15}{7}-\frac{7}{15}\times \frac{45}{7}\times \frac{2}{7}$$
$$\frac{15}{7}-\frac{7\times 45}{15\times 7}\times \frac{2}{7}$$
$$\frac{15}{7}-\frac{45}{15}\times \frac{2}{7}$$
$$\frac{15}{7}-3\times \frac{2}{7}$$
$$\frac{15}{7}-\frac{3\times 2}{7}$$
$$\frac{15}{7}-\frac{6}{7}$$
$$\frac{15-6}{7}$$
$$\frac{9}{7}$$
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$\frac{3 ^ {2}}{7} = 1\frac{2}{7} = 1.2857142857142858$
