rename 3/4"to 0.75"

how to rename all pipe name and branch name containing 3/4" to 0.75", 1 1/2" to 1.5". (i.e. fractional to decimal system).
Is there any macro?

Using list

!!ce.nam=!!ce.nam.replace('3/4"','0.75')

!!ce.nam=!!ce.nam.replace('11/2"','1.5"')