Fiona spent ¹₁₀ of her money on some post-it pads. She spent ²₉ of the remaining money on some staplers and ³₇ of what was left on some punchers.

1. What fraction of her money was spent on punchers?
2. Given that the post-it pads cost $6 less than the punchers, find the sum of money that Fiona spent.

Post-it Pads	Remaining money
1	9
	Staplers	Left
	2	7
		Punchers	Rest
1 u	2 u	3 u	4 u

(a)
Fraction of money left after spending on the post-it pads
= 1 - ¹₁₀
= ⁹₁₀

Fraction of remaining money after spending on the staplers
= 1 - ²₉
= ⁷₉

Fraction of what was left after spending on the punchers
= 1 - ³₇
= ⁴₇

Fraction of money that was spent on punchers = ³₁₀

(b)
Amount that Fiona spent on the post-it pads = 1 u
Amount that Fiona spent on the punchers = 3 u

Amount that the post-it pads cost less than the punchers
= 3 u - 1 u
= 2 u

2 u = 6

1 u = 6 ÷ 2 = 3

Amount that Fiona sent
= 1 u + 2 u + 3 u
= 6 u
= 6 x 3
= $18

Answer(s): (a) ³₁₀; (b) $18