Mrs. Garcia’s students were asked to find 220% of 75. Each of the students had a different method.Amy: “I multiplied 2.20 by 75 to find my answer.”Braden: “I created a table with columns for 100%, 100%, 20%, and 220%. Then I filled in the table and added the values.”Colton: “I created a table with columns for 100%, 10%, 10%, and 220%. Then I filled in the table and added the values.”Danielle: “I divided 75 by 5 to find 20%. Then I added 75 twice to what I found to get my final answer.” If all of the students completed their steps accurately, which student got the answer wrong?
220% of 75 is 2.2 × 75 = 165. Amy gets 165 directly, Braden adds 75 + 75 + 15 = 165, and Danielle adds 15 + 75 + 75 = 165. Colton’s listed parts, 100%, 10%, and 10%, add to only 120%, not 220%, so his method does not account for the whole amount.
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