Evaluate
\frac{31}{28}\approx 1.107142857
Factor
\frac{31}{2 ^ {2} \cdot 7} = 1\frac{3}{28} = 1.1071428571428572
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\frac{20+11}{18-\left(-10\right)}
The opposite of -11 is 11.
\frac{31}{18-\left(-10\right)}
Add 20 and 11 to get 31.
\frac{31}{18+10}
The opposite of -10 is 10.
\frac{31}{28}
Add 18 and 10 to get 28.
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