Solve -91/280+123/861

$$- \frac{ 91 }{ 280 } + \frac{ 123 }{ 861 }$$

Evaluate

$$-\frac{51}{280}\approx -0.182142857$$

Solution Steps

Reduce the fraction \frac{91}{280} to lowest terms by extracting and canceling out 7.

$$-\frac{13}{40}+\frac{123}{861}$$

Reduce the fraction \frac{123}{861} to lowest terms by extracting and canceling out 123.

$$-\frac{13}{40}+\frac{1}{7}$$

Least common multiple of 40 and 7 is 280. Convert -\frac{13}{40} and \frac{1}{7} to fractions with denominator 280.

$$-\frac{91}{280}+\frac{40}{280}$$

Since -\frac{91}{280} and \frac{40}{280} have the same denominator, add them by adding their numerators.

$$\frac{-91+40}{280}$$

Add -91 and 40 to get -51.

$$-\frac{51}{280}$$

Factor

$$-\frac{51}{280} = -0.18214285714285713$$