The numbers are respectively 121/2\% and 25\% more than a third number. The as a percentage of the second number is :

Answer: Option D

Let the third number be $$x$$
Then, first number :
= $$112\frac{1}{2}\%$$  of $$x$$
= $$\frac{9x}{8}$$
Second number :
= 125% of $$x$$
= $$\frac{5x}{4}$$
∴ Required percentage :
= $$\left(\frac{9x}{8}\times \frac{4}{5x}\times 100\right)$$   %
= 90%