This can be solved in two (or three) steps.
1. Convert each of the fraction to an improper fraction.
2. Multiply the numerators - put the answer into the numerator of the result. Similar with the denominators.
3. Simplify the result. (You can also simplify before doing the actual multiplication).
0.9083333
No.
Yes, four fifths is 80% and three fourths would be 75%.
4/5 x 6 3/4 is 5 2/5
Yes.
2 fourths times four fifths is 2 fifths.
0.9083333
No.
No.
Yes, four fifths is 80% and three fourths would be 75%.
3/4 * 4/5 = 3/5 or 0.6
25
1 7/20
4/5 x 6 3/4 is 5 2/5
16 11/20
Yes.
six and eleven twentieths