Solve 1-9/10-1/2=

$$1 - \frac { 9 } { 10 } - \frac { 1 } { 2 } =$$

Evaluate

$$-\frac{2}{5}=-0.4$$

Solution Steps

Convert 1 to fraction \frac{10}{10}.

$$\frac{10}{10}-\frac{9}{10}-\frac{1}{2}$$

Since \frac{10}{10} and \frac{9}{10} have the same denominator, subtract them by subtracting their numerators.

$$\frac{10-9}{10}-\frac{1}{2}$$

Subtract 9 from 10 to get 1.

$$\frac{1}{10}-\frac{1}{2}$$

Least common multiple of 10 and 2 is 10. Convert \frac{1}{10} and \frac{1}{2} to fractions with denominator 10.

$$\frac{1}{10}-\frac{5}{10}$$

Since \frac{1}{10} and \frac{5}{10} have the same denominator, subtract them by subtracting their numerators.

$$\frac{1-5}{10}$$

Subtract 5 from 1 to get -4.

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

Reduce the fraction \frac{-4}{10} to lowest terms by extracting and canceling out 2.

$$-\frac{2}{5}$$

Factor

$$-\frac{2}{5} = -0.4$$