The following line graph shows the favourite colour of a group of people.
What percent of the total number of people like black colour ?
What is the value of \(\frac{\tfrac{1}{1}\div\tfrac{1}{2}\times\tfrac{1}{2}+\tfrac{1}{2}\times\tfrac{1}{2}\div\tfrac{1}{2}}{\tfrac{1}{4}\times\tfrac{1}{4}\div\tfrac{1}{2}+\tfrac{1}{4}\times\tfrac{1}{4}\times\tfrac{1}{2}\div\tfrac{1}{2}}\) ?