Subject :IMO Class : Class 5

A combination lock requires 3 numbers to unlock. The second number is 3/5 of the first number. The third number is 3/4 of the second number. The difference between the first number and the third number is 33. What is the second number?

(A) 60

(B) 36

(C) 27

(D) 14

what is the best way to solve above?