$$\frac{7}{5}-\frac{1}{4}$$
$\frac{23}{20}=1.15$
$$\frac{28}{20}-\frac{5}{20}$$
$$\frac{28-5}{20}$$
$$\frac{23}{20}$$
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$\frac{23}{2 ^ {2} \cdot 5} = 1\frac{3}{20} = 1.15$