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