Evaluate
-\frac{11}{40}=-0.275
Factor
-\frac{11}{40} = -0.275
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\frac{4}{40}-\frac{15}{40}
Least common multiple of 10 and 8 is 40. Convert \frac{1}{10} and \frac{3}{8} to fractions with denominator 40.
\frac{4-15}{40}
Since \frac{4}{40} and \frac{15}{40} have the same denominator, subtract them by subtracting their numerators.
-\frac{11}{40}
Subtract 15 from 4 to get -11.
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