15/8 : 25/3 = 9/40 --------------------- 9/40 = X : 4/9 X = 9/40 * 4/9 X = 1/10 X = 0,1
Х=4/9*1 7/8 : 8 1/3 1) 4/9*15/8=5/6 2) 5/6 :25/3=5/6*3/25=0,1