Solve 1/14-1/20

$$\frac{ 1 }{ 14 } - \frac{ 1 }{ 20 }$$

Evaluate

$$\frac{3}{140}\approx 0.021428571$$

Solution Steps

Least common multiple of 14 and 20 is 140. Convert \frac{1}{14} and \frac{1}{20} to fractions with denominator 140.

$$\frac{10}{140}-\frac{7}{140}$$

Since \frac{10}{140} and \frac{7}{140} have the same denominator, subtract them by subtracting their numerators.

$$\frac{10-7}{140}$$

Subtract 7 from 10 to get 3.

$$\frac{3}{140}$$

Factor

$$\frac{3}{2 ^ {2} \cdot 5 \cdot 7} = 0.02142857142857143$$