Then we multiply the result by 100 to get a percentage number. An example calculation from the 5.00 ml pipette is: ((5.00 ml - 4.9178 ml)/5.00 ml)*100 = 1.6438%. The percentage error allows us to see which type of glassware is the most accurate in measuring substances. From our results, we concluded that the variable automatic pipettor was the most accurate, as it had the lowest percentage error of 0.0500%. The volumetric pipette, volumetric flask, and burette all had similar percentage errors at 1.0430%, 0.6394%, and 0.6619%, respectively. These results indicate that these types of glassware are still very accurate. After that, the graduated cylinder had a percentage error of 1.6400%, which is still relatively low, indicating that the graduated cylinder is also very accurate. The beaker and flask both had higher percentage errors, at 7.5218% and 9.4146%, respectively. The beaker and flask were not accurate in measuring the substances. This is perhaps due to the fact that they are larger and are intended to hold larger volumes of water, or they are intended to hold and pour substances. After finding out