Hazel spent ²₅ of her money on 3 pencils and 9 correction tapes. The cost of one correction tape was thrice the cost of one pencil. She bought some more correction tapes with ¹₅ of her remaining money. How many correction tapes did Hazel buy altogether?

3 pencils and 9 correction tapes	Remaining amount
2x5	3x5
	More correction tapes	Left
	1x3	4x3
10 p	3 p	12 p

Cost of 1 pencil = 1 u
Cost of 1 correction tape = 3 u

Cost of 3 pencils = 3 x 1 u = 3 u
Cost of 9 correction tapes = 9 x 3 u = 27 u

Total cost of 3 pencils and 9 correction tapes
= 3 u + 27 u
= 30 u

10 p = 30 u

1 p = 30 ÷ 10 = 3 u

Amount that Hazel used to buy more correction tapes
= 3 p
= 3 x 3 u
= 9 u

Number of more correction tapes that Hazel bought
= 9 u ÷ 3 u
= 3

Total number of correction tapes that Hazel bought
= 9 + 3
= 12

Answer(s): 12