We know that 1 gallon is equivalent to 4 quarts.
Let's call gallons and quarts. An expression that represents the transformation between these two units is
This expression represents the conversion factor we described at the beginning.
So, if we have 2.5 gallons, using the expression, we find the number of quarts
Therefore, 2.5 gallons are equal to 10 quarts.
(Because there are 4 quarts in 1 gallon)
2.5 * 4 = 10.
There are 10 Quarts in 2.5 Gallons.