Here we convert the cardinal number twenty-one (21) to an
ordinal number. This is useful if you want to use the number 21 as an
adjective when you speak or write it.|
There are two ways of writing 21 as an ordinal number, either with letters
and numbers or just letters as follows:
When would you be using the ordinal instead of the cardinal version of 21
You use 21 (cardinal) if you are describing how many of something, and you use 21st (ordinal) if you
are describing a position or rank of something.
Like we mentioned above, remember to use the ordinal version of 21 when
21 is used as an adjective.
Convert 22 cardinal to ordinal
Go here for the next number we converted from cardinal to ordinal.