How to Round a Decimal Number
Decimal numbers can be very long. After a few decimal places, depending on what the number is being used to express, the smaller numbers become irrelevant. You can round the decimal to the nearest number after any number of decimal places. You must round the number to its closest shorter decimal number. For example 0.41 would be rounded to 0.4 whereas 0.48 would be rounded to 0.5.
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Instructions
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Decide on the amount of decimal places you would like to round the number to. For example if you would like to round to two decimal places, the number would end at two numbers past the decimal point (i.e 3.45).
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Round the number up if the lower decimal number is over 5. For example, a decimal of 2.346412 being rounded to two decimal places would be 2.35, as the third number in the sequence is closer to 10 than it is to 0.
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Round the number down if the decimal number is less than 5. For example if the number 3.56278064 is rounded to two decimal places, the final number would be 3.56 as the third number in the sequence is closer to 0 than it is to 10.
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References
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