61 - 51 = 9 9 / 60 = .15 therefore 9 is 15% of 60.
8/15 minus 7/20 is 11/60
-9/20 1 - 1/2 - 1/3 - 1/4 - 1/5 - 1/6 = 60/60 - 30/60 - 20/60 - 15/60 - 12/60 - 10/60 = -27/60 = -9/20
56/60 - 20/60 = 36/60 36/60 = 3/5
x2 - 19x + 60 = x2 - 15x - 4x + 60 = x(x - 15) - 4(x - 15) = (x - 15)(x - 4)
80 - 2 - 60 - 3 = 15
420 minus 60 is 360.
you can not do anything to get 60
77/12 - 411/15 = 735/60 - 444/60 = 695/60 - 444/60 = 251/60
45 - 15 - 15 = 15
11/20 - 2/15 = 11x3/20x3 - 2x4/15x4 = 33/60 - 8/60 = (33 - 8)/60 = 25/60 = 25÷5/60÷5 = 5/12
60 - (-60) = 120