A similar triangle would probably have the same angles and vertices only in a different order
Well,
2.5(18) = 45
45 = 45
It's as simple as that. n=18 is the solution to the problem.
Answer: 1500 readers
explanation: all readers take up 100%
100/50=2
100% / 50 = 2%
2% x 50 = 100%
30 x 50 = 1500 readers