Firstly we'll begin wth the concept of yield, and then we'll look at the difference between that and atom economy and hopefully study how it is used in industry.
I have used a lot of other books and revision resources too :)
Well in percentage yield it's all about how useful or wasteful the actual process was for e.g:- walking the long way to school is a more lengthy process where as the short way isn't as time consuming and be a better option
however in atom economy measures how wasteful of useful the reaction e.g. so even if you took a long way to get to school you still managed to carry out your purpose of getting an education
So I see it as you're having something to do but you need to choose how to do it in the best way (yield) , however it still important that everything goes to plan despite how you do it (atom economy)
Therefore if you have something) with 100% percentage yield that doesn't necessarily mean it has 100% atom economy (just because someone revises in the 'right' way that doesn't mean they'll get 100 UMS in their exam, does it?)
-I hope that made the concept seem a little bit easier