Answer:
it is d
Step-by-step explanation:
0.75, 0.625, 0.5, 0.45
ratio means over so,
<u>1</u><u>0</u><u>0</u><u> </u>= <u>n</u>
500 5
<u>5</u><u>0</u><u>0</u>n = 500
500
n=1