Irene paid a total of $200 for a jacket, a pair of socks and a pair of ballet shoes. She spent ⁴₅ of her money on the pair of socks. The pair of ballet shoes cost 4 times as much as the jacket. How much more did she pay for the pair of ballet shoes than the jacket?
Amount that Irene paid for the pair of socks
= ⁴₅ x 200 
= $160

Amount that Irene left after buying the socks
= 200 - 160
= $40

Amount that Irene paid for the jacket = 1 u
Amount that Irene paid for the ballet shoes = 4 u

Total amount spent on the jacket and the pair of ballet shoes
= 1 u + 4 u
= 5 u

5 u = 40

1 u = 40 ÷ 5 = 8

Amount that Irene paid more for the pair of ballet shoes than the jacket
= 4 u - 1 u
= 3 u
= 3 x 8
= $24

Answer(s): $24