Rounding of Numbers with Decimal Places
Date: 5/31/96 at 12:14:29 From: Joan Ching Subject: Rounding up of numbers with decimal place Dear Dr. Math, May I ask a question about the rounding of numbers with decimal places? If a number, 12.4547, is rounded up to 2 decimal places, what is its value? 12.45 or 12.46? Someone told me that it should be 12.46. Is this correct? Thank you very much! Joan
Date: 5/31/96 at 15:36:45 From: Doctor Byron Subject: Re: Rounding up of numbers with decimal place Generally, you are only concerned with the one decimal place immediately to the right of the one you are going to round to. If it is 5 or higher, you round up. Otherwise, you round down. So in your problem of rounding 12.4547 to two decimal places, look at the _third_ decimal place only to determine which way to round. Since it is a 4, you round down, and the number becomes: 12.45 -Doctor Byron, The Math Forum Check out our web site! http://mathforum.org/dr.math/
Search the Dr. Math Library:
Ask Dr. MathTM
© 1994- The Math Forum at NCTM. All rights reserved.