Solve 8*143div7-20*(85div6)=

$$8 \times 143 \div 7 - 20 \times ( 85 \div 6 ) =$$

Evaluate

$$-\frac{2518}{21}\approx -119.904761905$$

Solution Steps

Multiply 8 and 143 to get 1144.

$$\frac{1144}{7}-20\times \frac{85}{6}$$

Express 20\times \frac{85}{6} as a single fraction.

$$\frac{1144}{7}-\frac{20\times 85}{6}$$

Multiply 20 and 85 to get 1700.

$$\frac{1144}{7}-\frac{1700}{6}$$

Reduce the fraction \frac{1700}{6} to lowest terms by extracting and canceling out 2.

$$\frac{1144}{7}-\frac{850}{3}$$

Least common multiple of 7 and 3 is 21. Convert \frac{1144}{7} and \frac{850}{3} to fractions with denominator 21.

$$\frac{3432}{21}-\frac{5950}{21}$$

Since \frac{3432}{21} and \frac{5950}{21} have the same denominator, subtract them by subtracting their numerators.

$$\frac{3432-5950}{21}$$

Subtract 5950 from 3432 to get -2518.

$$-\frac{2518}{21}$$

Factor

$$-\frac{2518}{21} = -119\frac{19}{21} = -119.9047619047619$$