Percentage question

Question

 Each month he makes about $180 from a part-time job. Dalton's parents also send him $55 per month. The sum of Dalton's paycheck and the money he gets from his parents is 9% more than his total expenses. How much money does Dalton have available to add to his savings account each month?

Answer 1

180 +55= 235 per month income

,

235 = 1.09 expenses = 1.09E

E = 235/1.09 = $215.60

235-215.60 = $19.40 left over in savings, per month