What fraction of 256 is 192 in decimal form?

192/256

Since both numbers are even , they will cancel down by '2'

Hence

96/128 And again

96/128 = 48/64

48/64 = Cancels down by '8'

6/8 = 3/4

3/4

means '3' divided by '4' , which is 0.75 as a decimal.