Hilfe nochmals !

was ist 9 4/9 - 7 37/54

$\color{BrickRed}9\frac{4}{9}-7\frac{37}{54}\\ =\frac{9\cdot 9+4}{9}-\frac{7\cdot 54+37}{54}\\ =\frac{85}{9}-\frac{415}{54}\\ =\frac{6\cdot 85-415}{54}\\ =\frac{95}{54}$

$=1\frac{41}{54}$

  !