But $ \frac{144}{256} = \frac{9}{16} $? $144 \div 16 = 9$, $256 \div 16 = 16$, but $16 \times 16 = 256$, $16 \times 9 = 144$, yes. But $ \frac{144}{256} = \frac{144 \div 16}{256 \div 16} = \frac{9}{16} $, correct.