Question

Ben left a 20% tip for his later if he left $4.20 how much did his bill come before the tip

Answer 1

Answer: 21 dollars was his bill before the tip

Step-by-step explanation: 4.20 is 20% of what he paid with no tip included. This means you can set up an equation like this.

4.20 = .2x This means that $4.20 is (is means =) 20% of (of means multiply) x (which is the unknown factor).

Answer 2

$21

Explanation:

Let the amount of bill before tip was $x.

`\therefore \: 20 \% of \: x = 4.20 \\ \\ \therefore \: (20)/(100) * x = 4.20 \\ \therefore \: x = 4.20 * (100)/(20) \\ \\ \therefore \: x = 4.20 * 5 \\ \\ \therefore \: x = \$ 21.00`

Hence, the bill before tip was $21.