Min spent 80% of her money on a number of pens. She spent 20% of the remaining money on a few stamps and 50% of what was left on a number of stickers.
- What fraction of her money was left?
- Given that the pens cost $36 more than the stickers, find the sum of money Min had at first.
(a)
80% =
80100 =
45 Fraction of money left after buying the pens = 1 -
45 =
15 20% =
20100 =
15 Fraction of remaining money after buying the stamps = 1 -
15 =
45 50% =
50100 =
12 Fraction of what is left after buying the stickers = 1 -
12 =
12 Fraction of money left after buying the pens
=
15 x
45 x
12=
225 (b)
Fraction of money spent on the stickers
=
15 x
45 x
12=
225Fraction of money spent on the pens
=
45=
2025Amount spent more on the pens than the stickers
= 20 u - 2 u
= 18 u
18 u = 36
1 u = 36 ÷ 18 = 2
Amount that Min had at first
= 25 u
= 25 x 2
= $50
Answer(s): (a)
225; (b) $50
