Convert currency base from one base to another

Question

Consider a list of currency rates where the base is USD:

1 USD = 

0.90390 EUR
0.74771 GBP
1.30101 CAD

how can I convert the base from USD to GBP, such that I end up with:

1 GBP = 

1.33767 USD
1.20993 EUR
1.74146 CAD

What kind of formula do I need to apply to each rate to convert the base? Note: rates are taken from xe.com and the desired output example might not be exactly correct.

Answer 1

Writing it as an answer to close the question,

Divide by rate of the desired new base. Here it is GBP, so divide by 0.74771.