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The common denominator of the two fractions is: 8

$ \frac{10}{8 }= \frac{(1*10)}{(1*8)} =\frac{ 10}{8} $

$ \frac{5}{4 }= \frac{(2*5)}{(2*4)} =\frac{ 10}{8} $

Fractions adjusted to a common denominator

$ \frac{10}{8 }-\frac{ 5}{4 }=\frac{ 10}{8 }-\frac{ 10}{8} $

$ \frac{(10-10)}{8 }=\frac{ 0}{8} $

$ \frac{0}{8 }= 0 $

$ $

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