If CE : EA = 2 : 3
Then the altitude of triangle ABE = 3 / (3 + 2) = 3/5 the altitude of triangle ACD
And if AD : DB = 4 : 5
Then the base of triangle ABE to the base of triangle ACD = (4 + 5) / 4 = (9/4)
Call the area of triangle ACD =(1/2) A * B where A is the altitude and B is the base
And the area of triangle ABE = (1/2) ( 3/5)A * ( 9/4) B = (1/2) (27/20) AB
So
[ACD] / [ ABE ] = (1/2) AB / {(1/2) AB (27/20) ] = 1 / (27/20) = 20 /27