75% of 450 + ? % of 560 = 600

75% of 450 + ? % of 560 = 600 

$\frac{75 x 450}{100} + \frac{? x 560}{100} = 600\frac{75 x 9}{2} + \frac{28p}{5} = 600\frac{75x9x5 + 56p}{10} = 6003375 + 56p = 600056p = 2625p = 46.875$

Hence, in the given question ? = 46.875