its it correct proced ?
If the number is -90.10 and after rounding off / it become 90 , is it right ?
You can round a number to the nearest tenth, hundredth, thousandth etc. by looking at the last digit to keep. If the next digit is less than 5 then you leave the number to the predecessor and If the next digit is greater than 5 then you leave the number to the successor.
90.10 can be rounded off as 90.
90. 60 can be rounded as 91.