Verified answer

2*40 1/2 : 9         9

__________ = ____ = 9:4,5= 2

6,52-11 1/50      4,5

2*40 1/2=2*81/2=162/2=81

81/9=9

6,52-11 1/50=6,52-551/50=6,52-11,02=4,5

2 * 40 1/2=81/9=9

6,52-11 1/15= 4 1020/1500

9:4 1020/1500= 1 12/13