Question

if answer is 8.888888 then what to consider 8.88 or 8.89 ?

Answer 1

Personally I prefer 8.88

Answer 2

Hey! Here is your answer!

▶▶If your answer is 8.8888888 then you can't consider it as 8.89 as 0.01 is added.
▶But it can be written as 8.88 or 8.8 or 8.8bar
▶ If you want to write it in exam you can write it as 8.88 not 8.9 but it can be rounded-off to 8.9 or 9.

Hope it works