Well, theres actually a lot of fractions equivalent to 3/60 but if you only need 2 examples is pretty simple, you choose a random number and then you multiply 3 and 60 by the same number, for example
3* 10 = 30 60* 10 = 600 so 30/600 is equivalent to 3/60 second example
3* 4 = 12 60* 4 = 240 so 12/240 is equivalent to 3/60 and also 30/600, that´s it, i hope i helped you if i did, be sure to mark me as thankful, and please mark me as the best answer it would help me a lot