Multiply each value by its weight
Add all the weighted values together
Add all the weights together
Divide the total weighted value by the total weight
Weighted average = (sum of value × weight) ÷ (sum of weights)
Multiply each value by its weight
Add all the weighted values together
Add all the weights together
Divide the total weighted value by the total weight
Weighted average = (sum of value × weight) ÷ (sum of weights)