2/4
All the others cancel down to 1/4
4/16 If you divide both sides by 4 you get 1/4
25% is one quarter as a percentage so it’s 25/100 which is 1/4
0.25 is also 25/100 so that is again 1/4
And 5/20 if you divide the top and bitten by five you get 1/4
