420 US customary teaspoons in US tablespoons

Conversion formula
How to convert 420 US customary teaspoons to US tablespoons?

We know (by definition) that: $1\mathrm{usteaspoon}\approx 0.333333333333333\mathrm{ustablespoon}$

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

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

Conclusion: 420 ⁢ usteaspoon ≈ 139.99999999999986 ⁢ ustablespoon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US tablespoon is equal to 0.00714285714285714 times 420 US customary teaspoons.

It can also be expressed as: 420 US customary teaspoons is equal to $\frac{1}{\mathrm{0.00714285714285714}}$ US tablespoons.

Approximation

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