4(1/4 -0,18):2/3

4(1/4 -0,18):2/3 = 4(0,25-0,18):2/3 = 0,28 :2/3 = 28/100 :2/3 = 7/25*3/2=21/50

4(5/20 - 36/20) :2/3 6,2 :2/3 62/10 * 3/2= 9,9

4(1/4 -0,18):2/3 = 1 - (18/25) : (2/3) = 1 - (18/25) * (3/2) = 1 - (27/25) = (25/25) - (27/25) = - (2/25)