I am Subracting two Double Variable numbers getting 0 as output But for Some other values I am getting output as like this -2.98023E-08 why it is happening

Screenshot 2022-01-26 183133

internally computers will get a small fraction as a result.

have a look here and also for some solution approaches:

But if i minus this two Values by manual means i am getting Zero as output

what exactly is meant by manually?
Did you checked the referenced topic in detail?

Screenshot 2022-01-26 190411
i entered =G178-I178 formula in seperate cell i am getting 0 as output, see for all the remaining rows i am getting 0 as output