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Answer:
It depends
Step-by-step explanation:
Does the question specify how many decimal places you are rounding to?
If it's to 1: 0.2, as the next digit is 1 so you round down if it's less than 5
If it's to 2: 0.22 - as the next digit is 8 and you round up if it's greater than or equal to 5.
If it's to 3: 0.218 - as the next digit is 2 so you round down for the reasons above.
If it's to 4: 0.2183 - as the next digit is 5 so you round up for the reasons above.
Hope this helps! Let me know if you have any questions :)