Solve 4.2*5-27.9div3

$$4.2 \times 5 - 27.9 \div 3$$

Evaluate

$$11.7$$

Solution Steps

Multiply 4.2 and 5 to get 21.

$$21-\frac{27.9}{3}$$

Expand \frac{27.9}{3} by multiplying both numerator and the denominator by 10.

$$21-\frac{279}{30}$$

Reduce the fraction \frac{279}{30} to lowest terms by extracting and canceling out 3.

$$21-\frac{93}{10}$$

Convert 21 to fraction \frac{210}{10}.

$$\frac{210}{10}-\frac{93}{10}$$

Since \frac{210}{10} and \frac{93}{10} have the same denominator, subtract them by subtracting their numerators.

$$\frac{210-93}{10}$$

Subtract 93 from 210 to get 117.

$$\frac{117}{10}$$

Factor

$$\frac{13 \cdot 3 ^ {2}}{2 \cdot 5} = 11\frac{7}{10} = 11.7$$