4/5. - 5/102/6. +. 1/2
4/5 - 5/10 =4/5 = 8/105/10 = 5/108/10 - 5/10 = 3/10 ( lowest form)how I got the denominator is 10 and 5 can go into each other. so 5 x 2 = 10 so, 2 x 4 = 8. 5/10 stays the same. then subtract.
