Solve 21*(1-5/9)

$$21 \times (1- \frac{ 5 }{ 9 } )$$

Evaluate

$$\frac{28}{3}\approx 9.333333333$$

Solution Steps

Convert 1 to fraction \frac{9}{9}.

$$21\left(\frac{9}{9}-\frac{5}{9}\right)$$

Since \frac{9}{9} and \frac{5}{9} have the same denominator, subtract them by subtracting their numerators.

$$21\times \frac{9-5}{9}$$

Subtract 5 from 9 to get 4.

$$21\times \frac{4}{9}$$

Express 21\times \frac{4}{9} as a single fraction.

$$\frac{21\times 4}{9}$$

Multiply 21 and 4 to get 84.

$$\frac{84}{9}$$

Reduce the fraction \frac{84}{9} to lowest terms by extracting and canceling out 3.

$$\frac{28}{3}$$

Factor

$$\frac{2 ^ {2} \cdot 7}{3} = 9\frac{1}{3} = 9.333333333333334$$