63-26 3 17 50 50

Решение:
$$63\frac{3}{50} - 26\frac{17}{50} = (63-26) + (\frac{3}{50} - \frac{17}{50}) = 37 - \frac{14}{50} = 36\frac{50}{50} - \frac{14}{50} = 36\frac{36}{50} = 36\frac{18}{25}$$

Ответ: $$36\frac{18}{25}$$