What is 12/77 \div 4/21 ?

The solution to 12/77 \div 4/21 is 9/11

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12/77 \div 4/21

\frac{12}{77} \div \frac{4}{21}

\frac{9}{11}

Solution steps

\frac{12}{77} \div \frac{4}{21}

Apply the fraction rule:

\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}

= \frac{12}{77} \times \frac{21}{4}

Multiply fractions:

\frac{a}{b} \times \frac{c}{d} = \frac{a \times c}{b \times d}

= \frac{12 \times 21}{77 \times 4}

Multiply the numbers:

12 \times 21 = 252

= \frac{252}{77 \times 4}

Multiply the numbers:

77 \times 4 = 308

= \frac{252}{308}

Cancel the common factor:

28

= \frac{9}{11}

\frac{1}{9} + 2

s^{6} + s^{5} - 6 s^{4} - s^{2} - s + 6

12 x^{2} + 24 x - 4

\frac{1 + 3 a}{25}

\frac{75 x ^{5}}{12 x y ^{2}}