42% of a number is 892.5. What is 73% of that number ?

Let the number be x
Then,
$$\eqalign{ & 42\% \,\,{\text{of}}\,\,x = 892.50 \cr & \Rightarrow \frac{{42x}}{{100}} = 892.50 \cr & \Rightarrow x = \left( {\frac{{892.5 \times 100}}{{42}}} \right) \cr & \Rightarrow x = 2125 \cr & \therefore 73\% \,\,{\text{of}}\,\,2125 \cr & = \left( {\frac{{73}}{{100}} \times 2125} \right) \cr & = 1551.25 \cr} $$