Yes, one fifth and one tenth are fractions.
Yes one fifth is more than one tenth.
No. Half of one tenth is 1/20. To get 1/5 take two 'one tenth's ie twice of one tenth is one fifth.
It is: 3/10
It is 22%.
No, one tenth is half of one fifth.
"A Tenth" is the same as "One Tenth" so there is 1 Tenth in a tenth. But that answer might be subjective because I have been discovering how many sips are in a fifth.