Apharmacist measured 189 ml using a graduated cylinder. based on her experience, the volume did not seem to be correct. this volume was again measured using a calibrated standard device, from which it was determined that the volume of the liquid was actually 225.0 ml. what is the % error in this measurement? (% answer to the nearest tenth)

16%

Step-by-step explanation:

The formula to calculate the percent error is given by :-

Given : A pharmacist measured 189 mL using a graduated cylinder.

i.e. The approximate volume =189 mL

Also,  volume was again measured using a calibrated standard device, from which it was determined that the volume of the liquid was actually 225.0 mL.

i.e. the Exact volume=  225.0 mL

Now, the percent error in this measurement :-

Hence, the percent error in this measurement = 16%