Abi spent ¹₇ of her salary on a washing machine and ³₄ of the remainder on a refrigerator. If she saved the remaining $72, how much was her salary?
Fraction of the salary spent on the washing machine = ¹₇

Fraction of the salary on the remainder
= 1 - ¹₇
= ⁶₇

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

Washing Machine	Remainder		Total
1x2	6x2		7x2
	Refrigerator	Savings
	3x3	1x3
2 u	9 u	3 u	14 u

The remainder and the total amount on the refrigerator and the savings are the same. Make the remainder and the total amount on the refrigerator and the savings the same.  LCM of 6 and 4 is 12.

Total salary = 14 u

Amount spent of the washing machine = 2 u
Amount spent on the refrigerator = 9 u
Amount of savings = 3 u

3 u = 72

1 u = 72 ÷ 3 = 24

Abi's salary
= 14 u
= 14 x 24
= $336

Answer(s): $336