What does the hash sign mean in this sum?

THE % (B # C) = (A % B) # (A PER CENT C)

Actually, the % could be either Break down or Flourish.

The # could be either Put or Substract.

For example:A * (B — C) = (A * B) — (A * C)

It would look to become plus indication in conceal.And this % is really a multiplier.ie (A * B) + (A * C)= A* ( B+C ).