A percentage is a pure number: it has no measurement units.
Any measurement on a ratio scale can be recorded as a percentage.
relative humidity
Your measurement should include one estimated digit.
4
4 of them.
Percentages are percentages - simple! The marketing people have not yet come up with "new improved" percentages.
Relative humidity is recorded in percentages.
relative humidity
relative humidity
data
cubit
The Egyptans did
Because it takes too long to spell out the value in words!
Your measurement should include one estimated digit.
4 of them.
4
4 of them.
the nearest .01 mL