Answer:
0.78
Explanation:
To know which one is the greatest, convert all of them into decimals.
3/4 is the same as 0.75
50% is the same as 0.50
0.78 doesn't needs to be changed
We now have 0.75, 0.50 and 0.78.
Out of all these numbers, 0.78 is the greatest number.
Hope this helps.