How do you calculate the percentage of purchases from a specific campaign?

• A. Divide the number of purchases with the specific code by the total number of purchases and multiply by 100
• B. Multiply the total purchases by 100
• C. Divide total by specific code
• D. Add specific code purchases to total purchases

Answer: (A)

Finding the share of total purchases attributed to a specific campaign is about measuring proportion. You want the number of purchases that have the campaign’s code divided by the total number of purchases, then convert to a percentage by multiplying by 100. The result tells you what percent of all purchases came from that campaign. For example, if there are 200 total purchases and 50 include the campaign code, 50/200 × 100 = 25%. The other methods don’t compute a share: multiplying the total by 100 just scales the total; dividing the total by the code reverses the ratio; adding the campaign-code purchases to total purchases mixes counts rather than forming a ratio.