How to convert 668 imperial quarts to imperial gallons?
We know (by definition) that:
We can set up a proportion to solve for the number of imperial gallons.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 imperial gallon is equal to 0.00598802395209581 times 668 imperial quarts.
It can also be expressed as: 668 imperial quarts is equal to imperial gallons.
An approximate numerical result would be: six hundred and sixty-eight imperial quarts is about one hundred and sixty-seven imperial gallons, or alternatively, a imperial gallon is about zero point zero one times six hundred and sixty-eight imperial quarts.
 The precision is 15 significant digits (fourteen digits to the right of the decimal point).Results may contain small errors due to the use of floating point arithmetic.