What is 81/42 Divided By 4/5

Solving $\frac{81}{42}\div\frac{4}{5}$

• Rewrite the Division as Multiplication by the Reciprocal:

$\frac{81}{42} \div \frac{4}{5} = \frac{81}{42} \times \frac{5}{4}$

• Multiply the Numerators: $81 \times 5 = 405$
• Multiply the Denominators: $42 \times 4 = 168$
• Form the New Fraction: $\frac{81}{42} \times \frac{4}{5} = \frac{405}{168}$

Let's Simplify $\frac{405}{168}$

• Find the Greatest Common Divisor (GCD) of $405$ and $168$. The GCD of $405$ and $168$ is $3$.
• Divide both the numerator and the denominator by the GCD:$\frac{405 \div 3}{168 \div 3} = \frac{135}{56}$

Answer $\frac{81}{42}\div\frac{4}{5} = \frac{135}{56}$

The following animation demonstrates the divide-by,