b) Subtract 12 kg 525 g from 28 kg 6 g kg g Step-1 First solve grams column 2 8 0 0 6 Step-2 Then solve kg column - 1 2 5 2 5 = 1 5 4 8 1 Thus, 28 kg 6 g - 12 kg 525 = 15 kg 481 g