What is one minus one half
1 is equal to two 0.5, i.e. 1-0.5 = 0.5
Four and one-half minus one-half equals ()
Four and a half minus one half equals (2 and 1 / 4)
One half to one fifth = one fourth to X
(1/2):(1/5)=(1/4):X
X = (1 / 5) x (1 / 4) / (1 / 2) = 1 / 10 (one tenth)