What is 81/42 Divided By 4/8

Solving $\frac{81}{42}\div\frac{4}{8}$

• Rewrite the Division as Multiplication by the Reciprocal:

$\frac{81}{42} \div \frac{4}{8} = \frac{81}{42} \times \frac{8}{4}$

• Multiply the Numerators: $81 \times 8 = 648$
• Multiply the Denominators: $42 \times 4 = 168$
• Form the New Fraction: $\frac{81}{42} \times \frac{4}{8} = \frac{648}{168}$

Let's Simplify $\frac{648}{168}$

• Find the Greatest Common Divisor (GCD) of $648$ and $168$. The GCD of $648$ and $168$ is $24$.
• Divide both the numerator and the denominator by the GCD:$\frac{648 \div 24}{168 \div 24} = \frac{27}{7}$

Answer $\frac{81}{42}\div\frac{4}{8} = \frac{27}{7}$

The following animation demonstrates the divide-by,