have a col a and col b data

5.65 25
5.52 21
5.51 26
5.25 55
5.21 65
5.26 95
5.51 69
5.52 98
5.55 68
5.52 96
5.66 92
5.95 95

and wan to reference col b data 96 from col a 5.52

anYone has a formula to reference 96? tried alots of waYs to reference 96 from 5.52 but not valid