80.72% is the change from 249 to 450
Calculation steps:
[( 450 - 249 ) ÷ 249] x 100 = 80.72%
Formula
Percentage change = [(450 - 249) / 249] x 100
Subtract the new number by the original number
450 - 249 = 201
201 ÷ 249 = 0.8072289156626506
0.8072289156626506 x 100 = 80.72%