The price is 6500*0.95 after the 1st discount. The price is (6500*0.95)*0.9 after the 2nd discount. The price is ((6500*0.95)*0.9)*0.88 after the 3rd discount. The net price is 6500*(0.95*0.9*0.88) = 6500*0.7524 = 4890.60. ANSWER The number 0.7524 is the effective price-reducing factor. It is the value, which YOU WANT to see.
5% discount means that the price paid was 1 - 5% = 95%, or .95
Likewise, 10% discount means that the price paid was 1 - 10% = 90%, or .9
And, 12% discount means that the price paid was 1 - 12% = 88%, or .88
Final price paid: