Clarification on "Percentage composition"

[vcnainala]

Researchers are asked for the percentage composition.

What is a percentage composition? Weight percentage? Mole fraction in percentages? Volumen-percentages?

[NRayya]

We agreed on Weight percentage, we still need to clarify it to the user.
An alternative would be to allow the user to pick the type (volume, moles..)

[tilfischer]

Currently, it is not specified which type of composition in meant, hence, it is not clear what the user is asked for. Is the user ask for the purity corresponding the the structure provided? If this is true, it should be called purity and this is usually given in weight percentage.