To find the percentage of $56 that equals $42, you can set up the equation:
\[ \frac{x}{100} \times 56 = 42 \]
Where \( x \) is the percentage we want to find.
First, isolate \( x \):
\[ x \times 56 = 42 \times 100 \] \[ x \times 56 = 4200 \] \[ x = \frac{4200}{56} \] \[ x = 75 \]
Thus, the completed statement is:
75% of $56 = $42.