Per mille (‰) — introduction
Compute the requested value. 1 ‰ = 1/1000 of the whole.
A solution of 1000 ml contains 20 ml of salt. How many per mille of salt is that?
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What does this generator do?
The generator gives two versions: either you find the per mille from a part, or you find the part from a known per mille.
How to solve it
Per mille works like percent, only divided by 1000 instead of 100. ‰ = part / whole × 1000. The other way: part = whole × ‰ / 1000.