2:3 1:8 2:5 20: 1 4:5 27:2

Go through 4:3 8:5 3:20 4/5 8/20.

578:340=(578 divided by 2): (340 divided by 2) = 289:170 =17:10.

1 grade 120:40=3: 1

Class 2117: 39 = 3:1

Class 3123: 41= 3:1.

The side length ratio is 4:6=2:3.

The bottom area ratio is 16:36=4:9.

The ratio of surface area is 96:2 16= 16:36=4:9.

The volume ratio is 64: 216 =16: 54 = 8: 27.