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copied!<p>Javadoc for the first situation:</p> <blockquote> <p>Returns a BigDecimal whose value is (this / divisor), and whose scale is as specified. If rounding must be performed to generate a result with the specified scale, the specified rounding mode is applied.</p> </blockquote> <p>and the Javadoc for the second situation:</p> <blockquote> <p>Returns a BigDecimal whose value is (this / divisor), with rounding according to the context settings.</p> </blockquote> <p>referring to the javadoc for MathContext we get:</p> <blockquote> <p>Immutable objects which encapsulate the context settings which describe certain rules for numerical operators, such as those implemented by the BigDecimal class. The base-independent settings are: precision: the number of digits to be used for an operation; results are rounded to this precision roundingMode: a RoundingMode object which specifies the algorithm to be used for rounding.</p> </blockquote> <p>So in the first case, you specified a SCALE of 2, meaning that you round to 2 decimal places of accuracy, where the rounding is performed as a floor function. The second calculation has a specified PRECISION of 2, which is rounded to two digits of accuracy, where the rounding is a floor function. So, in the first case, you asked for 2 digits <em>after the decimal place</em>, and in the second, you just asked for 2 digits. If, for example, you had asked for 4 digits in your MathContext, you'd get 66.66 as you answer.</p> <p>So I don't think that this is a bug so much as that the two methods don't perform the same calculation.</p>

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