First turn 15% into a decimal= .15
Multiply .15 * 245 =$36.75 ok that’s the first discount!
Second discount is 10% so turn 10% into a decimal (by dividing your percentage by 100) = .10
Multiply .10*245= $24.50 <- that’s your second discount
Ok now take both those answers and subtract them from her original $245 bill.
245-(24.50+36.75)= $183.75
Her final bill is $183.75