Question

What is the total cost for a $20 haircut with a 15% tip

Answer 1

$23

Explanation:

Answer 2

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:


`\sf{(115)/(100)* 20=x}`

Simplify that:


`\sf{(115)/(5) = x}`

And simplifying that further, you get the final answer as:


`\huge{\boxed{\bf{x=23}}}`

So you have to pay $23 after the tip :)