If you are working with a negotiated rate, make sure the rate is correct for the project's activity (research, instruction, or other) and that the proper location is used (on campus, off campus, or a mixture of both).
If a reduced rate was awarded, make sure it is the same as that on the NOA (Notice of Award) or the original proposal.
Do not attempt to calculate the rate. You need to compare and ensure it is correct. If it is not correct, contact OSR (Office of Sponsored Research).