So do you agree inn that case B received 1,800 of A No 2s.The word "percent" isn't there but the symbol is.
"Out of A’s 6,000 total votes, 30% gave their second preference to B, and 20% gave their second preference to C.
B receives 300 votes (30% of 1,000) and C receives 200 votes (20% of 1,000)"