Min spent ¹₄ of her salary on a kettle and ³₅ of the remainder on a microwave oven. If she saved the remaining $216, how much was her salary?
Fraction of the salary spent on the kettle = ¹₄

Fraction of the salary on the remainder
= 1 - ¹₄
= ³₄

Fraction of the remainder on savings
= 1 - ³₅
= ²₅

Kettle	Remainder		Total
1x5	3x5		4x5
	Microwave Oven	Savings
	3x3	2x3
5 u	9 u	6 u	20 u

The remainder and the total amount on the microwave oven and the savings are the same. Make the remainder and the total amount on the microwave oven and the savings the same.  LCM of 3 and 5 is 15.

Total salary = 20 u

Amount spent of the kettle = 5 u
Amount spent on the microwave oven = 9 u
Amount of savings = 6 u

6 u = 216

1 u = 216 ÷ 6 = 36

Min's salary
= 20 u
= 20 x 36
= $720

Answer(s): $720