Solve (-7div8)-1div2+3div5=

$$(-7 \div 8)-1 \div 2+3 \div 5=$$

Evaluate

$$-\frac{31}{40}=-0.775$$

Solution Steps

Fraction \frac{-7}{8} can be rewritten as -\frac{7}{8} by extracting the negative sign.

$$-\frac{7}{8}-\frac{1}{2}+\frac{3}{5}$$

Least common multiple of 8 and 2 is 8. Convert -\frac{7}{8} and \frac{1}{2} to fractions with denominator 8.

$$-\frac{7}{8}-\frac{4}{8}+\frac{3}{5}$$

Since -\frac{7}{8} and \frac{4}{8} have the same denominator, subtract them by subtracting their numerators.

$$\frac{-7-4}{8}+\frac{3}{5}$$

Subtract 4 from -7 to get -11.

$$-\frac{11}{8}+\frac{3}{5}$$

Least common multiple of 8 and 5 is 40. Convert -\frac{11}{8} and \frac{3}{5} to fractions with denominator 40.

$$-\frac{55}{40}+\frac{24}{40}$$

Since -\frac{55}{40} and \frac{24}{40} have the same denominator, add them by adding their numerators.

$$\frac{-55+24}{40}$$

Add -55 and 24 to get -31.

$$-\frac{31}{40}$$

Factor

$$-\frac{31}{40} = -0.775$$