How to calculate percentages?
We remember that for calculating percentages, we take the percent as a fraction. And that it becomes a multiplication between the fraction and the number. For example, 15% represents:
When we simplify the last fraction.
Now, in our exercise
In this exercise, we have to calculate the tip, which is the 20% of the total bill. As we see before, we just have to calculate the fraction and make the multiplication between that fraction and the bill value (58.74).
This means that the tip will be $11.748.