What is 81/18 Divided By 4/1

Solving $\frac{81}{18}\div\frac{4}{1}$

• Rewrite the Division as Multiplication by the Reciprocal:

$\frac{81}{18} \div \frac{4}{1} = \frac{81}{18} \times \frac{1}{4}$

• Multiply the Numerators: $81 \times 1 = 81$
• Multiply the Denominators: $18 \times 4 = 72$
• Form the New Fraction: $\frac{81}{18} \times \frac{4}{1} = \frac{81}{72}$

Let's Simplify $\frac{81}{72}$

• Find the Greatest Common Divisor (GCD) of $81$ and $72$. The GCD of $81$ and $72$ is $9$.
• Divide both the numerator and the denominator by the GCD:$\frac{81 \div 9}{72 \div 9} = \frac{9}{8}$

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

The following animation demonstrates the divide-by,