Reddit mentions of Lab Math: A Handbook of Measurements, Calculations, and Other Quantitative Skills for Use at the Bench, Second edition

I highly recommend you these books: labmaths and at the bench

I work in Food Safety / QC. My chemistry and math grades were mediocre.

The extent of chemistry I’m expected to understand involves knowing reactions on biological media & reagents, easily referenced materials. The complex chemistry is handled by Chemists.

Math consists of basic lab calculations (serial dilutions, microbial counts, molarity, etc.). Statistics is helpful if you want to understand sampling plans, but isn’t necessary for bench work.

If you’re concerned, Lab Math provides a comprehensive overview of bench basics.

Remember, work isn’t school. If you don’t recall/understand something you can take a little time refreshing on the material before undertaking a project/analysis.