Question

Lynn measured the length of her front yard by counting her strides. The yard measured 18.5 feet long. Emily measured the same yard using a tape measure, and found that it was 20 feet long. What was the percent error of Lynn's measurement?

Answer 1

8.11%

Explanation:

We need to find the percentage error. We can follow the formula shown below:

`PE=(New-Orig)/(Orig)*100`

Where

PE is the Percentage Error

New is the newest measure (given as 20 feet)

Orig is the original, or first, measure (given as 18.5)

Substituting and finding the PE:

`PE=(New-Orig)/(Orig)*100\\PE=(20-18.5)/(18.5)*100\\PE=(1.5)/(18.5)*100\\PE=8.11`

Tagging the percentage , percent error is about 8.11%