Answer: 324 trees
Explanation: (cross multiply and divide)
In a fraction put x over 450 then next to it put 72 over 100 hundred
Cross multiply
72x450=32,400
100x= 32,400 (Divide each side of equation by 100)
X= 324
-OR- Just multiply 450 by .72
Either way you get the same answer. Hope this helped:)