Solve 3/10-4/5

$$\frac { 3 } { 10 } - \frac { 4 } { 5 }$$

Evaluate

$$-\frac{1}{2}=-0.5$$

Solution Steps

Least common multiple of 10 and 5 is 10. Convert \frac{3}{10} and \frac{4}{5} to fractions with denominator 10.

$$\frac{3}{10}-\frac{8}{10}$$

Since \frac{3}{10} and \frac{8}{10} have the same denominator, subtract them by subtracting their numerators.

$$\frac{3-8}{10}$$

Subtract 8 from 3 to get -5.

$$\frac{-5}{10}$$

Reduce the fraction \frac{-5}{10} to lowest terms by extracting and canceling out 5.

$$-\frac{1}{2}$$

Factor

$$-\frac{1}{2} = -0.5$$