Answer
$0.47$
Work Step by Step
The given expression is
$=\frac{7\; gal}{min}$
$1 \;gal = 4\; qt$
Multiply each side by $7$.
$7\times 1 \;gal =7\times 4\; qt$
Simplify.
$7 \;gal =28\; qt$
$1\;min=60\;sec$.
Substitute both the values into the given expression.
$=\frac{28\; qt}{60\;sec}$
Simplify.
$=\frac{0.47\; qt}{\;sec}$
Hence, the correct fill in the blank is $0.47$.