I am having the following doubt. I am calculating a weighted average from a set of ratios. This calculation give me as result 1.87 as shown below:

Weighted Average of Ratios

My problem lies when I am asked to report the avg values of X and Y. I tried to do the same operation, having a weighted average from x and y values and finally, to make a ratio between those two. The ratio value is different to the 1.87 calculated first.

Weighted Average of Numerators and Denominators separately and ratio of those results

I know that mathematically isn't the same, I just want to understand why and also if there is any way of getting the values that I am looking for, that gives me a ratio for 1.87

Thank you a lot!


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