No.
No.
Yes, four fifths is 80% and three fourths would be 75%.
25
As a decimal: 0.05 As a fraction: 1/20
2 fourths times four fifths is 2 fifths.
Three fourths = three divided by four = 0.75
Four and three fourths divided by one fourth = 19/1 or 19.
1 7/20
Yes.
16 11/20