a pharmacist measures 60mL of glycerin by difference, starting with 100mL. After completing the measurement, he notes the graduate he used contained 45mL of glycerin. calculate the percentage of error incurred in the measure.

Answer 1

He meant to measure out 60 which would have left 40 in the graduated cylinder. But he left 45 there which is 5 mL more than intended.
%error =(5/60)*100 = ?

Answer 2

so the answer would be 8.33%

Answer 3

I agree