In the report sent to you by the fund company, the balance refers to the number of units you hold.

And your loss, that is, the amount of money you lose, is calculated according to this formula:

Decline value of unit net value * number of units you hold = loss value.

So it is deducted from each share, but after multiplying by the number of units, it is deducted from the total fund (it should be called the total value).