Find the HCF of $\frac{36}{51}$ and $3 \frac{9}{17}$.
12/17
19/13
12/13
11/17
Here, $\frac{36}{51}=\frac{12}{17}$ and $3 \frac{9}{17}=\frac{60}{17}$
Now, we have to find the HCF of $\frac{12}{17}$ and $\frac{60}{17}$
According to the formula,
HCF of fractions = $\frac{H C F \text { of Numerators }}{L C M \text { of Denominators }}=\frac{H C F \text { of } 12 \text { and } 60}{L C M \text { of } 17 \text { and } 17}=\frac{12}{17}$