is 16:60 and 4:15 equivalent?

Yes, the ratios 16 : 60 and 4 : 15 are equivalent.

16 : 60
= 16/4 : 60/4
= 4 : 15

Assuming this is based on time, then no.

16:60 means 16 hours, 60 minutes.
The 16 hours translates to 4pm, but the additonal 60 minutes adds another hour. So its 5pm.

5pm is obviously later than 4:15.


You also have to consider the question of whether the 4:15 is am or pm. If they're both based on a 24 hour clock, then even 4:15 and 16:15 would not be equivelant, because one would be am and one would be pm.

As ratios, yes.
Both elements of the first can be divided by 4 to give the second.