Answer:
$22
Step-by-step explanation:
1. Approach;
In order to solve this problem, one would want to find the value of the tip, and then add it to the base price.
2. Find the tip;
A simple hack to find the percent of a number is to divide the percent (when it is still in a percent form) by 100, then multiply it but the number one wants to find the percent of.
10 / 100 = 0.1
20 * 0.1 = 2
The tip is $2.
3. Add it to the base price
base price + tip
20 + 2
22
