Question

In 7th Grade Math, please provide step by step explanation to resolve the following problem: Sarah said she could type 80 words per minute, but she only texted 52 words per minute. What was Sarah's percent error

Answer 1

To find Sarah's percent error, we can use the formula:

Percent Error = (|Observed Value - Actual Value| / Actual Value) * 100

In this case, the observed value is the number of words per minute that Sarah actually typed (52 words per minute), and the actual value is the number of words per minute that Sarah claimed she could type (80 words per minute).

Let's plug these values into the formula:

Percent Error = (|52 - 80| / 80) * 100

To simplify the expression inside the absolute value, we have:

Percent Error = (|-28| / 80) * 100

The absolute value of -28 is 28, so we can rewrite the equation as:

Percent Error = (28 / 80) * 100

Now, divide 28 by 80:

Percent Error = (0.35) * 100

Finally, multiply 0.35 by 100 to get the percent error:

Percent Error = 35%

Therefore, Sarah's percent error is 35%.