Answer:
73.07%
Explanation:
Given that,
Actual value of sold cookies = 26
Assumed value of sold cookies = 45
We need to find Gabby's percent error. The percentage error in a value is given by :
Error = ](Assumed value - Actual value)/Actual value]× 100
So,
![\%=(45-26)/(26)* 100\\\\=73.07\%](https://img.qammunity.org/2022/formulas/mathematics/college/ug9629az4bwqb9d4eq0ya0sn24sutinuaa.png)
So, Gabby's percent error is equal to 73.07%.