The 15% tip on freds lunch bill came came to $2.40. What was the amount of the bill after adding the tip?

Question

Can you show me how to do it

Answer 1

Since the tip is 15% of some cost x, we can calculate that.

Remember to write the percent as a decimal for the calculations

Think of the tip as the question 2.40 is 15% of what number?

2.40/x = 15/100

Multiply both sides by x

2.40 = 15x/100

2.40 = 0.15x

So the tip 2.40 = 0.15x

Divide both sides 0.15 to solve for x

And that makes the cost before the tip 2.40/0.15 = 16.00

$16.00

The total bill for his lunch would be the cost before the tip plus the tip

We can calculate the final bill as $16.00 + $2.40 = $18.40

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