To determine if the equation \( \frac{13}{4} - 3 = \frac{1}{4} \) is true or false, let's simplify the left side:
1. Convert \( 3 \) to a fraction with a denominator of \( 4 \):
\[
3 = \frac{12}{4}
\]
2. Substitute this into the equation:
\[
\frac{13}{4} - \frac{12}{4} = \frac{1}{4}
\]
3. Now subtract the fractions:
\[
\frac{13 - 12}{4} = \frac{1}{4}
\]
\[
\frac{1}{4} = \frac{1}{4}
\]
Since both sides are equal, the equation is true.
Thus, the answer is \( 1 \).