Question

Frank ran 80% as far as Denise. How far did Denise run as a percentage of Frank's running distance?

Answer 1

Denise ran `20%` further than Frank.

Explanation:

Frank ran `80%` as far as Denise.
Then Denise has run `100%` of the reference distance.

So Denise ran `100%-80%=20%` further than Frank.