21 US tablespoons in US gallons

Conversion formula
How to convert 21 US tablespoons to US gallons?

We know (by definition) that: $1\mathrm{ustablespoon}\approx 0.00390625\mathrm{usgallon}$

We can set up a proportion to solve for the number of US gallons.

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

Conclusion: 21 ⁢ ustablespoon ≈ 0.08203125 ⁢ usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 12.1904761904762 times 21 US tablespoons.

It can also be expressed as: 21 US tablespoons is equal to $\frac{1}{\mathrm{12.1904761904762}}$ US gallons.

Approximation

An approximate numerical result would be: twenty-one US tablespoons is about zero point zero eight US gallons, or alternatively, a US gallon is about twelve point one eight times twenty-one US tablespoons.