I can no longer find a combination that chooses a course grade in a non rational way (i.e. always choosing to either round up or round down in all cases where the calculated grade is exactly midway between to course letter grade values.)

Since I can't find a way to get an unexpected grade, this is a QA pass

This is now on smartsite-dev.rsmart.com as part of the 1.3.0-b13 tag.

Discussed fix during meeting where Kirk was present.

I thought one of the previous fixes was steering AWAY from MATH_CONTEXT. Let's be sure we are consistent here. I would concur that this is a blocker. Can we get the fix on test26 for testing?

So David and I did some more checking on this issue. It turns out that "today" all the gradebooks show the problem in a "consistent" manner. This is true for DEV, TEST, and PROD.

The issue is the following. Given the following grades, we get the following final grade:

HW1, HW2 --> Final Grade
A+, A --> A
A, A- --> A
A-, B+ --> A-

It should consistently round up to the higher grade, so we should get:
A+, A --> A+
A, A- --> A
A-, B+ --> A-

The problem is that we don't consistently use precision and or scale. For example the above (A+,A --> A) compares the following numbers:
96.666666668222222220877777777800000000000000
96.66666667

The fix is to "force" the percentage that's passed into the convertPercentageToLetterGrade(...) method to adhere to the general MATH_CONTEXT. I tested this locally and it seems to fix this issue.