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I explained it on paper, so the question will be easier to understand.
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The first step to dividing decimals is to remove the decimal point. Next, in this case, you would remove the 0's at the beginning because they will not do anything to the problem. (you can only remove zero if they are at the front of both numbers) then you would do 81 divided by 9. after you get that number, count the amount of decimal places from the back that there are. (its hard to explain, but the answer would be three points. so, the answer = 0.2