How do You Compute a Weighted Average?

Weighted average is computed by multiplying each weight with its value and summing up all these and then dividing this result with the sum of all weights.Let me give you an example:w1,v1w2, v2w3, v3step1 = multiply each weight with its value:w1*v1w2*v2w3*v3step2: add them up:w1*v1 + w2*v2 + w3*v3step3: divide them with sum of all weights i.e Wt (Wt = w1 + w2+ w3)w1*v1 + w2*v2 + w3*v3 divided by Wt