Ask HN: Naming convention for a percentage stored as a value from 0 to 1

Say you’re storing a percentage like “state tax”. You store it as a decimal: 0.4 means 40%. What do you call this type when you need to name a db column or a variable? Technically it is not a percent until you * 100.

“Decimal fraction” seems most correct but is very verbose. No one is writing taxRateDecimalFraction as a var name.