Question

The dinner bill comes to $30, and you want to leave a 20% tip. What is the total cost of the bill?

Answer 1

The total of cost of the bill will be $36

Answer 2

$36

Explanation:

First, let us make an expression to solve this using the given information.

For that let the total cost be x.

Amount of the bill tip total cost

100 ⇒ 20 ⇒ 120

30 ⇒ 20 ⇒ x

Accordingly,

100 ⇒ 120

30 ⇒ x

Use cross multiplication and solve for x.

100x = 120 × 30

100x = 3600

Divide both sides by 100.

x = $ 36