Solve 68/15-67/12

$$\frac{ 68 }{ 15 } - \frac{ 67 }{ 12 }$$

Evaluate

$$-\frac{21}{20}=-1.05$$

Solution Steps

Least common multiple of 15 and 12 is 60. Convert \frac{68}{15} and \frac{67}{12} to fractions with denominator 60.

$$\frac{272}{60}-\frac{335}{60}$$

Since \frac{272}{60} and \frac{335}{60} have the same denominator, subtract them by subtracting their numerators.

$$\frac{272-335}{60}$$

Subtract 335 from 272 to get -63.

$$\frac{-63}{60}$$

Reduce the fraction \frac{-63}{60} to lowest terms by extracting and canceling out 3.

$$-\frac{21}{20}$$

Factor

$$-\frac{21}{20} = -1\frac{1}{20} = -1.05$$