A 22-ounce bowl of crackers contains 18 percent cheese crackers. Aida computed 18 percent of 22. Her work is shown below.

Question

18 percent of 22 1.8 times 22 = 39.6

Which statement explains Aida’s error?
Aida did not use 0.18 for 18 percent.
Aida did not multiply 1.8 and 22 correctly.
Aida did not use 0.018 for 18 percent.
Aida did not move the decimal point three places to the left in the answer.

Answer 1

Aida's error is that she did not use 0.18 for 18 percent.

The correct way to find 18 percent of 22 ounces is to multiply 22 by 0.18:

\[ 22 \times 0.18 = 3.96 \]

Aida mistakenly interpreted 18 percent as 1.8, leading to her incorrect multiplication. Therefore, the correct explanation for her error is:

Aida did not use 0.18 for 18 percent.