Arrange the ratios 7:20,13:25,17:30 and 11:15 in decreasing order.
To arrange the ratios, we need to find their fractional values
7:20=720=0.35
13:25=1325=0.52
17:30=1730=0.57
Arranging these numbers in decreasing order we get
0.73,0.57,0.52,0.35
11:15,17:30,13:25,7:20