What is the difference between percent yield and theoretical yield?

[KristySpra]

I’m learning about chemical reactions and need help understanding what theoretical yield and percent yield mean, and how to calculate them. Can someone explain with examples?

 

[DeeReich70]

Theoretical yield is the maximum amount of product that could form from given reactants, calculated using stoichiometry and assuming perfect reaction conditions. Percent yield measures the efficiency of a reaction by comparing the actual yield obtained experimentally to the theoretical yield, expressed as a percentage.