maggie has 20 ribbons. Of them, 2/5 are polka dotted ribbons. How many ribs are not polka-dotted?

Uhh idk

I just made up that name lol i am not a mr Mrs miss mis ms or anything

2/5 of 20 is 8 that ARE polka dotted, therefore there are 12 that are not.

3/5

wwerty

2/5 of 20 is 8 that ARE polka dotted, therefore there are 12 that are not.

(5/5 - 2/5) * 20 = ?