In this case, its 0.9259. Get started with the video on the right, then dive deeper with the resources below. Create your fishbone diagram in minutes. Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. The threshold for accuracy can vary from class to class and from question to question, but the higher, the better. (Optional) End your curve at the point where you started drawing to create a closed shape.