What is 81/18 Divided By 4/8

Solving $\frac{81}{18}\div\frac{4}{8}$

• Rewrite the Division as Multiplication by the Reciprocal:

$\frac{81}{18} \div \frac{4}{8} = \frac{81}{18} \times \frac{8}{4}$

• Multiply the Numerators: $81 \times 8 = 648$
• Multiply the Denominators: $18 \times 4 = 72$
• Form the New Fraction: $\frac{81}{18} \times \frac{4}{8} = \frac{648}{72}$

Let's Simplify $\frac{648}{72}$

• Find the Greatest Common Divisor (GCD) of $648$ and $72$. The GCD of $648$ and $72$ is $72$.
• Divide both the numerator and the denominator by the GCD:$\frac{648 \div 72}{72 \div 72} = \frac{9}{1}$

Answer $\frac{81}{18}\div\frac{4}{8} = \frac{9}{1}$

The following animation demonstrates the divide-by,