Question

(25% of 50% of 100%)/(25 of 100*50% of 100)=?

Answer 1

"of" means multiplication and "%" means "divided by 100"
(25% of 50% of 100%)/(25 of 100*50% of 100)
$$\begin{gathered} \frac{{\displaystyle \frac{25}{100}}\times {\displaystyle \frac{50}{100}}\times {\displaystyle \frac{100}{100}}}{25\times 100\times {\displaystyle \frac{50}{100}}\times 100} \\ =\frac{\cancel{25}\times \cancel{50}\times \cancel{100}}{100\times 100\times 100}\times \frac{\cancel{100}}{\cancel{25}\times \cancel{100}\times \cancel{50}\times 1\cancel{00}} \\ =\frac{1}{100\times 100}\times \frac{1}{100} \\ =\frac{1}{10000}\times \frac{1}{100} \\ =0.0001\times \frac{1}{100} \\ =0.0001\% \end{gathered}$$