We want to find how much gratuity is added to a party of 6 on a bill. To do so, we will use the percent equation.
part = percent * whole
We know that a restaurant automatically charges a 20 % gratuity if a party has 6 or more people, and the bill in the exercise is $141. Let's draw a bar diagram to represent the problem. In the diagram, c will represent the gratuity.
Now we will apply the percent equation to the given situation. For simplicity, we can temporarily ignore the units.
part = percent * whole [0.4em] ↓ [0.4em]
c = 20 % * 141
We need to write the percent as a decimal before we can solve the equation that we got. To write a percent as a decimal, we will ignore the percent symbol and move the decimal point two places to the left.
Therefore, 20 % is equal to 0.2.
c = 20 % * 141 [0.4em] ↓ [0.4em]
c = 0.2 * 141
Finally, we will solve the equation for c.
