$$40/26-2/14$$
$\frac{127}{91}\approx 1.395604396$
$$\frac{20}{13}-\frac{2}{14}$$
$$\frac{20}{13}-\frac{1}{7}$$
$$\frac{140}{91}-\frac{13}{91}$$
$$\frac{140-13}{91}$$
$$\frac{127}{91}$$
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$\frac{127}{7 \cdot 13} = 1\frac{36}{91} = 1.3956043956043955$