Sarah spent ¹₈ of her salary on a juicer and ²₃ of the remainder on a vacuum cleaner. If she saved the remaining $245, how much was her salary?
Fraction of the salary spent on the juicer = ¹₈

Fraction of the salary on the remainder
= 1 - ¹₈
= ⁷₈

Fraction of the remainder on savings
= 1 - ²₃
= ¹₃

Juicer	Remainder		Total
1x3	7x3		8x3
	Vacuum Cleaner	Savings
	2x7	1x7
3 u	14 u	7 u	24 u

The remainder and the total amount on the vacuum cleaner and the savings are the same. Make the remainder and the total amount on the vacuum cleaner and the savings the same.  LCM of 7 and 3 is 21.

Total salary = 24 u

Amount spent of the juicer = 3 u
Amount spent on the vacuum cleaner = 14 u
Amount of savings = 7 u

7 u = 245

1 u = 245 ÷ 7 = 35

Sarah's salary
= 24 u
= 24 x 35
= $840

Answer(s): $840