Question

Tonya went out to a restaurant for lunch. She tipped 12% of her bill, which brought the sum of the lunch bill plus the tip to $28.

How much was the original bill?

Answer 1

tip = 12% × bill

$28 = tip + bill

$28 = bill + 12% × bill
$28 = bill (1 + 12%)

bill = $28÷(1+12%) = $25