421 US customary teaspoons in UK tablespoons

Conversion formula
How to convert 421 US customary teaspoons to UK tablespoons?

We know (by definition) that: $1\mathrm{usteaspoon}\approx 0.328594772916667\mathrm{brtablespoon}$

We can set up a proportion to solve for the number of UK tablespoons.

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

Conclusion: 421 ⁢ usteaspoon ≈ 138.33839939791682 ⁢ brtablespoon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 UK tablespoon is equal to 0.00722865093388568 times 421 US customary teaspoons.

It can also be expressed as: 421 US customary teaspoons is equal to $\frac{1}{\mathrm{0.00722865093388568}}$ UK tablespoons.

Approximation

An approximate numerical result would be: four hundred and twenty-one US customary teaspoons is about one hundred and thirty-eight point three four UK tablespoons, or alternatively, a UK tablespoon is about zero point zero one times four hundred and twenty-one US customary teaspoons.