664 US customary cups in imperial quarts

Conversion formula
How to convert 664 US customary cups to imperial quarts?

We know (by definition) that: $1\mathrm{uscup}\approx 0.208168546157247\mathrm{imperialquart}$

We can set up a proportion to solve for the number of imperial quarts.

Now, we cross multiply to solve for our unknown $x$:

Conclusion: 664 ⁢ uscup ≈ 138.223914648412 ⁢ imperialquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial quart is equal to 0.00723463810545093 times 664 US customary cups.

It can also be expressed as: 664 US customary cups is equal to $\frac{1}{\mathrm{0.00723463810545093}}$ imperial quarts.

Approximation

An approximate numerical result would be: six hundred and sixty-four US customary cups is about one hundred and thirty-eight point two one imperial quarts, or alternatively, a imperial quart is about zero point zero one times six hundred and sixty-four US customary cups.