Carl went out for breakfast.
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So you are going to pay $20 and then a 15% tip on top of the 20.
And the 15% tip is 15% of $20.
To do less work, you can basically do 115% of 20 to find out the total cost instead of doing 15% of 20 and then adding that to 20.
Saying that x is the final price to pay, and converting the percents to fractions we get:
Simplify that:
And simplifying that further, you get the final answer as:
So you have to pay $23 after the tip :)
And the 15% tip is 15% of $20.
To do less work, you can basically do 115% of 20 to find out the total cost instead of doing 15% of 20 and then adding that to 20.
Saying that x is the final price to pay, and converting the percents to fractions we get:
Simplify that:
And simplifying that further, you get the final answer as:
So you have to pay $23 after the tip :)