IF function with calculations within it

Hello, 

I apologise if this has been already been posted but I could not find a similar query. 

I wanted to know if the IF forumla could contain calculations within it. 

My current formula works around some variation of this: IF(F3*0.03+f3=C3, true, false) which keeps returning a false value although I know the actual calculation is correct. 

To clarify, the value of F3 is 25.48 and the value of C3 is 26.55. Therefore, what I am trying to show is that F3*0.03+F3 = C3 (which is correct). 

I hope this makes sense and would really appreciate any advice anyone could provide! 

Thank you :)