Solve 18-3+1/2-3/20

$$18 - 3 + \frac { 1 } { 2 } - \frac { 3 } { 20 }$$

Evaluate

$$\frac{307}{20}=15.35$$

Solution Steps

Subtract 3 from 18 to get 15.

$$15+\frac{1}{2}-\frac{3}{20}$$

Convert 15 to fraction \frac{30}{2}.

$$\frac{30}{2}+\frac{1}{2}-\frac{3}{20}$$

Since \frac{30}{2} and \frac{1}{2} have the same denominator, add them by adding their numerators.

$$\frac{30+1}{2}-\frac{3}{20}$$

Add 30 and 1 to get 31.

$$\frac{31}{2}-\frac{3}{20}$$

Least common multiple of 2 and 20 is 20. Convert \frac{31}{2} and \frac{3}{20} to fractions with denominator 20.

$$\frac{310}{20}-\frac{3}{20}$$

Since \frac{310}{20} and \frac{3}{20} have the same denominator, subtract them by subtracting their numerators.

$$\frac{310-3}{20}$$

Subtract 3 from 310 to get 307.

$$\frac{307}{20}$$

Factor

$$\frac{307}{2 ^ {2} \cdot 5} = 15\frac{7}{20} = 15.35$$