Solve 4/5(3+04)-3,21

$$\frac { 4 } { 5 } ( 3 + 04 ) - 3,21$$

Evaluate

$$2,39$$

Solution Steps

Add 3 and 4 to get 7.

$$\frac{4}{5}\times 7-3,21$$

Express \frac{4}{5}\times 7 as a single fraction.

$$\frac{4\times 7}{5}-3,21$$

Multiply 4 and 7 to get 28.

$$\frac{28}{5}-3,21$$

Convert decimal number 3,21 to fraction \frac{321}{100}.

$$\frac{28}{5}-\frac{321}{100}$$

Least common multiple of 5 and 100 is 100. Convert \frac{28}{5} and \frac{321}{100} to fractions with denominator 100.

$$\frac{560}{100}-\frac{321}{100}$$

Since \frac{560}{100} and \frac{321}{100} have the same denominator, subtract them by subtracting their numerators.

$$\frac{560-321}{100}$$

Subtract 321 from 560 to get 239.

$$\frac{239}{100}$$

Factor

$$\frac{239}{2 ^ {2} \cdot 5 ^ {2}} = 2\frac{39}{100} = 2.39$$