no
no because 5 fourths is also equivalent to 5.25 and 4 fifths is also equivalent to 0.8. In addition to this, 5 fourths is also 5 pieces out of your pieces (which is greater than one) and 4 fifths is four pieces out of five pieces (which is less than one, also fifths are smaller than fourths).
25
9/20
no four fifths is one fifth less than five fifths
2 fourths times four fifths is 2 fifths.
Yes.
No
No.
No.
4/5= 0.85/4=1.255/4 is greater
4/5= .8 or 80%
Yes, four fifths is 80% and three fourths would be 75%.