Solve 8,4:2-12,5:5

$$8,4 : 2 - 12,5 : 5$$

Evaluate

$$1,7$$

Solution Steps

Expand \frac{8,4}{2} by multiplying both numerator and the denominator by 10.

$$\frac{84}{20}-\frac{12,5}{5}$$

Reduce the fraction \frac{84}{20} to lowest terms by extracting and canceling out 4.

$$\frac{21}{5}-\frac{12,5}{5}$$

Expand \frac{12,5}{5} by multiplying both numerator and the denominator by 10.

$$\frac{21}{5}-\frac{125}{50}$$

Reduce the fraction \frac{125}{50} to lowest terms by extracting and canceling out 25.

$$\frac{21}{5}-\frac{5}{2}$$

Least common multiple of 5 and 2 is 10. Convert \frac{21}{5} and \frac{5}{2} to fractions with denominator 10.

$$\frac{42}{10}-\frac{25}{10}$$

Since \frac{42}{10} and \frac{25}{10} have the same denominator, subtract them by subtracting their numerators.

$$\frac{42-25}{10}$$

Subtract 25 from 42 to get 17.

$$\frac{17}{10}$$

Factor

$$\frac{17}{2 \cdot 5} = 1\frac{7}{10} = 1.7$$