Solve -1/10+1/18

$$- \frac { 1 } { 10 } + \frac { 1 } { 18 }$$

Evaluate

$$-\frac{2}{45}\approx -0.044444444$$

Solution Steps

Least common multiple of 10 and 18 is 90. Convert -\frac{1}{10} and \frac{1}{18} to fractions with denominator 90.

$$-\frac{9}{90}+\frac{5}{90}$$

Since -\frac{9}{90} and \frac{5}{90} have the same denominator, add them by adding their numerators.

$$\frac{-9+5}{90}$$

Add -9 and 5 to get -4.

$$\frac{-4}{90}$$

Reduce the fraction \frac{-4}{90} to lowest terms by extracting and canceling out 2.

$$-\frac{2}{45}$$

Factor

$$-\frac{2}{45} = -0.044444444444444446$$