3 3/4:1 1/8=2 1/3: x
2 1/3 :x= 3 3/4 : 1 1/8 7/3 : x= 15/4 : 9/8 7/3 : x = 15/4 * 8/9 7/3 : x = 10/3 1/x = 10/3 * 3/7 1/x = 10/7 x= 7/10; 0,7