CONTOH PERHITUNGAN PERSENTASE ∑( ) KERUSAKAN ∗ 100% DINDING ∑( ) ∶ 10 2 ∶ 20 2 ∶ 5 2 : 200 2 Dinding % % % 10 5 20 = ∗ 100% = ∗ 100% = ∗ 100% 200 200 200 = 5% = 2.5% = 10% % = (5% ∗ 0.4) + (2.5% ∗ 0.6) + (10% ∗ 0.8) = 11.5% 25