Question

Frances left a 21% tip on a meal, including the tip, its cost was $54.45, what was the cost of the meal before tip.

Answer 1

x+0.21x=54.45 or 1.21x=54.45
x=54.45/1.21=45.
Check 45+(45*0.21)=45+9.45=54.45 ok.

Answer 2

$45.00