Verbal Percents eBook, contains both teacher and student copies. With answers for teacher and questions without answers for student.
There is no other book like it. Absolutely the very best way to polish up ability to do percents.
In daily life, the ability to quickly calculate percentages is so important.
Buy it for your middle school child and make every one in the family do it.

Can be used with high school students as well, those about to take their PSATs and SATs and are hesitant about their math skills.
It will bring a sense of mastery of this very important fundamental topic making all typical SAT type problems a breeze.

Who else will benefit:
Older persons to help build the lost ability to do math in your head.
College kids afraid of GRE and other math tests.
Bankers, brokers, sales people anyone who deals with money.
All of us who are losing our abilities because of ubiquitous calculators.

Have fun and speed up those rusty brain pathways.