21 UK tablespoons in US customary cups

Conversion formula
How to convert 21 UK tablespoons to US customary cups?

We know (by definition) that: $1\mathrm{brtablespoon}\approx 0.0634012925659556\mathrm{uscup}$

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

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

Conclusion: 21 ⁢ brtablespoon ≈ 1.3314271438850676 ⁢ uscup

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US customary cup is equal to 0.751073766666667 times 21 UK tablespoons.

It can also be expressed as: 21 UK tablespoons is equal to $\frac{1}{\mathrm{0.751073766666667}}$ US customary cups.

Approximation

An approximate numerical result would be: twenty-one UK tablespoons is about one point three three US customary cups, or alternatively, a US customary cup is about zero point seven five times twenty-one UK tablespoons.