The stadium tickets are priced at $25 and $17.  The number of $25-dollar tickets available is  2³₄ that of the number of $17-dollar tickets. 2 out of 5 of the $25-dollar tickets and all the $17-dollar tickets were sold. The ticket sales amounted to $2670. How much more would have been collected if all the tickets were sold?

	$25	$17
Comparing $25 and $17 tickets at first	11x5 = 55 u	4x5 = 20 u
Before	5x11 = 55 u
Change	- 2x11 = - 22 u	- 20 u
After	3x11 = 33 u	0 u

The number of 25 tickets at first is repeated.  Make the number of 25 tickets the same.  LCM of 5 and 11 is 55.

2³₄ = ¹¹₄

Number of $25 tickets : $17 tickets = 11 : 4

	$25	$17	Total
Number	22 u	20 u
Value	$25	$17
Total value	550 u	340 u	$2670

Total amount collected from the sale of the sold tickets
= 550 u + 340 u
= 890 u

1 u = 2670 ÷ 890 = 3

Number of $25-tickets left unsold
= 33 u 
= 33 x 3
= 99

More amount to be collected if all the tickets were sold
= 99 x 25
= $2475

Answer(s): $2475