4/8 can still be simplified into 1/2.
There is still 1/2 of the pizza left.
4 ÷ 4 = 1
8 ÷ 4 = 2
4/8 of a pizza is 1/2 of a pizza.
4/8 = 0.50
1/2 = 0.50 They are still equal.
We can also use proportion: a/b = c/d where ad = bc
4/8 = 1/2
4*2 = 8*1
8 = 8