Simplify : 101/8 of 1215 ÷ 3536 of 2049

Answer: Option D

$$\begin{array}{rl}& \text{Given expression,}\\ & \frac{81}{8}of\frac{12}{15}÷\frac{35}{36}of\frac{20}{49}\\ & =\frac{81}{10}÷\frac{25}{63}\\ & =\frac{81}{10}\times \frac{63}{25}\\ & =\frac{5103}{250}\\ & =20\frac{103}{250}\end{array}$$