[rman666]

In general, nothing more than grade school math is needed to learn web development. Obviously, if your developing a statistical healthcare application you’ll need more math skills, but for most websites and web applications all you need is basic math skills.

[noir_lord]

Indeed, I've seldom needed more than GCSE math (level of a 16 year old in the UK) in fact I can think of only a handful of times I've needed A-Level equivalent math (on notable occasion was solar insolation calculations).

It's just not a big issue in the life of a typical enterprise developer.