P2% (polyamide) = [1,00/1,00 - 1,00 × 0,9000/1,8000 + (1,4166/1,6000) × (1 - 1,00/1,00)] × 100 = 50,00
Р2% (поліамід) = [1,00/1,00 - 1,00 х 0,9000/1,8000 + (1,4166/1,6000) х (1 - 1,00/1,00)] х 100 = 50,00