Question

your bill for lunch was 26.45. This included a 15% tip. What was the cost of the meal without the tip?

Answer 1

to add \(15\%\) to a number, multiply it by \(100\%+15\%=115\%=1.15\) so you know
\[1.15x=26.45\] solve for \(x\) via
\[x=26.45\div 1.15\]