Average Percentage Calculator

Adding percentages up and dividing by how many there are is only correct when every group behind them is the same size. Enter each percentage together with the number of people, items or marks it was taken from, and you get the weighted average that is actually right, next to the simple mean for comparison. A second mode takes the raw counts instead, as a part and a total, which sidesteps the question entirely. Each row also shows how much of the total weight it carries, so you can see which group is driving the answer.