Gallery Problems Exercise

10% More

Work Time

10% More

Huey, Dewey, and Louie see lemonade crystals at the store. Next to the regular size is a “bonus box.”

Huey says: "The '10% more' statement on the bonus box is NOT accurate. There is really more than 10% more."

Dewey says: "The '10% more' statement is NOT accurate. There is actually only 5% more, since 50 − 45 = 5."

Louie says: "The '10% more' statement IS accurate, since 10% of 50 is 5."

Only one of the boys is correct.

  1. Decide who is correct and show, mathematically, why he is correct.
  2. Say what mistakes you think each of the other two boys made.