I don't know! But I do know how to find out.
To compare fractions one must bring them to a common denominator ( 30 here ) and convert them by multiplying with a form of one.
5*5/5*6 = 25/30
3*4/3*10 = 12/30
By this method we see that the fractions are not equivalent and 5/6 is almost twice the size of 4/10.