My 7th grade son has finished LoF Fractions and Decimals and Percents, but I feel like he really needs more practice before moving on to pre-algebra. I’m trying to figure out what to have him do. The obvious option is the LoF Zillions of Practice Problems books. But I’ve also thought of the SCM business math books. Would he get to practice with fractions, decimals and percents or would it be more regular addition, subtraction, multiplication with one of those?