Solve 80%*0.21-60%div4

$$80 \% \times 0.21 - 60 \% \div 4$$

Evaluate

$$0.018$$

Solution Steps

Reduce the fraction \frac{80}{100} to lowest terms by extracting and canceling out 20.

$$\frac{4}{5}\times 0.21-\frac{\frac{60}{100}}{4}$$

Convert decimal number 0.21 to fraction \frac{21}{100}.

$$\frac{4}{5}\times \frac{21}{100}-\frac{\frac{60}{100}}{4}$$

Multiply \frac{4}{5} times \frac{21}{100} by multiplying numerator times numerator and denominator times denominator.

$$\frac{4\times 21}{5\times 100}-\frac{\frac{60}{100}}{4}$$

Do the multiplications in the fraction \frac{4\times 21}{5\times 100}.

$$\frac{84}{500}-\frac{\frac{60}{100}}{4}$$

Reduce the fraction \frac{84}{500} to lowest terms by extracting and canceling out 4.

$$\frac{21}{125}-\frac{\frac{60}{100}}{4}$$

Express \frac{\frac{60}{100}}{4} as a single fraction.

$$\frac{21}{125}-\frac{60}{100\times 4}$$

Multiply 100 and 4 to get 400.

$$\frac{21}{125}-\frac{60}{400}$$

Reduce the fraction \frac{60}{400} to lowest terms by extracting and canceling out 20.

$$\frac{21}{125}-\frac{3}{20}$$

Least common multiple of 125 and 20 is 500. Convert \frac{21}{125} and \frac{3}{20} to fractions with denominator 500.

$$\frac{84}{500}-\frac{75}{500}$$

Since \frac{84}{500} and \frac{75}{500} have the same denominator, subtract them by subtracting their numerators.

$$\frac{84-75}{500}$$

Subtract 75 from 84 to get 9.

$$\frac{9}{500}$$

Factor

$$\frac{3 ^ {2}}{2 ^ {2} \cdot 5 ^ {3}} = 0.018$$