formula for true/false tolerance percent

Hi everyone I am new here and could use some help.

Here is what I am looking for:

I need to be able to get a true/false from a tolerance percent.

Here is an example of what I am trying to do

cell a2 is Nitrogen
cell b2 is (Known gas%) 2.4800%
cell c2 is (unknown gas%) 2.4963%
cell d2 is =b2-c2 and I get the answer no trouble there. what I need is to take the answer in cell d2 and set a plus/minus 2% tolerance in cell f2 and get a true/false comparison.

I hope that made some kind of sence Thanks in advance for any help.

Geeve