Question

Maria’s math test had 25 questions. She got 84% correct. How many problems did she get wrong

Answer 1

Maria got 84% correct, so she got 16% of the questions wrong. If you understand percentages, you'll know that you can multiply 0.16 and 25 to get 16% of 25, which is 4. So she got 4 problems wrong. If you don't understand this, you can use ratios. Set up a proportion to solve instead:

$\frac{Number Wrong}{Total Problems} = \frac{Percentage of Questions Wrong}{Total Percentage of Questions} \\ \frac{x}{25} = \frac{16}{100} \\ x= \frac{16}{4} \\ x=4$

So Maria got 4 questions wrong.

Answer 2

X divided by 25 is 84
Therefore, Maria got 21 correct out of the 25.

Do 25 - 21 (25 for the 25 questions and 21 for the ones she got correct)
25 - 21
=4

So, Maria got 4 problems wrong.