divide the top and bottom of the fraction each by 3 You should get 19/40
nothing
81/120 = 27/40
17/19 is the simplest form of 51 over 57.
19/40
19/8
120 over 80 is normal
10/11
The LCM of 120 and 57 is 2280.
Divide by 12: 3/10
Divide by 10/10 Get 120
2x60=120 120+57=177