The core idea
Divide the actual measured yield by the theoretical maximum yield, then multiply by 100%. Keep both yields in the same units. Values above 100% can indicate impurities or measurement error.
Try it yourself
Open the Percent Yield Calculator and enter your own values. Keep units consistent and compare the answer with the worked explanation.
Check your work
Write down your known quantities, convert units before substitution and confirm that your final units match the quantity you intended to calculate.