The percent difference formula for chemistry is expressed as (accepted value - experimental value) / accepted value * 100. Percent difference in chemistry is also called percent error. It is a common calculation that expresses the difference between a measured value and an actual one.
The percent difference formula can be helpful to calculate errors and validate the accuracy of theoretical models. A chemistry practitioner uses this formula in a number of scenarios, including when measuring heat or heat loss, reacting acids with bases, measuring how much product should be produced in comparison to what is actually produced or reacting two or more substances together to create a compound.