Odpowiedź:
80% = 0,8
0,8 * 15kg = 12 kg
100% - 25% = 75%
75% = 0,75
0,75 * 20 zł = 15 zł
200% = 2
2 * 3 kg = 6 kg
100% + 30% = 130%
130% = 1,3
1,3 * 200 kg = 260 kg
100% + 5% = 105%
105% = 1,05
1,05 * 320 zł = 336 zł
100% - 40% = 60%
60% = 0,6
0,6 * 80 zł = 48 zł
100% + 50 = 150%
150% = 1,5
1,5 * 60 m = 90 m