8.75/60 = earning per minute
0.50 = earning per minute x minutes
8.75/60 = 0.145833
0.50 = 0.145833 times X
0.50/0.145833 = 3.428 minutes
.5/8.75 = .0571 hours
X 60 min/hour = 3.43 minutes
you divide by 60 to see how much per minute you make, then divide that into 50 cents - no advanced math needed - 4th grade division
$0.50
--------------
$8.75
-------
hour
=0.05714285714
---------------------------
1
--------
hour
=0.05714285714 hours
0.05714285714hr............60 min
--------------------------- x -----------------
.................1........................
3.42857142857 minutes
3.43min