First, let's convert the percentages and fraction to decimal and then arrange from greatest to least
Jamail = 29.4% =0.294
Andrew = 37.6% = 0.376
Ernesto = 7/25 =0.28
Blake = 3/10 = 0.3
Now re-arrange from greatest to least
0.376 , 0.3 , 0.294, 0.28
Andrew, Blake, Jamail, Ernesto