If you can answer both.. I will mark you as brainlist. Pls answer ASAP!

Answer:
15 is b because there is 4 shaded out of 8 so it would be 4/8 then you would simplify by 4 which would get you 1/2 then divide which will get 50 %
Step-by-step explanation:
i do not know what 16 is sorry