Respuesta :

[tex] \frac{12 hops}{15 sec} x \frac{60 sec}{1 min}= \frac{720}{15 min} [/tex]

Your answer would be 720 hops per 15 minutes, which would simplify to be 48 hops per minute

 Hope this helps!
15 mins is 1/4 of a minute so 12 Times 4 witch is 48