19.75
it is 9/20
1/4 minus 1/5 is 1/20.
It is 1 3/20.
4/5 minus 1/4 is 11/20.
7/20
4/5 minus 1/4 is 11/20.
It is 1 3/20.
1/4-1/10= 5/20-2/20=3/20 [3/20]
1/4 minus 2/5 minus 3/10 is equal to -0.45 or -9/20
1/4 - 2/5 = 5/20 - 8/20 = (3/20)
2/5 - 1/4 = 8/20 - 5/20 = 3/20 = 0.15.
(20) - (1/4) - (1/3) - (1/6) = (240/12) - (3/12) - (4/12) - (2/12) = (231/12) = (77/4) = 19.25