1) 0,8 * 7/12 = 8/10 * 7/12 = (2*7)/(10*3) = 14/30 2) 1 2/3 * 0,6 = 5/3 * 6/10 = (1*2)/(1*2) = 2/2 = 1 3) 1,25 * 32/45 = 125/100 * 32/45 = (25*8)/(25*9) = 8/9 4) 4,5 * 3 1/3 = 45/10 * 10/3 = 45/3 = 15