81.93% is the change from 249 to 453
Calculation steps:
[( 453 - 249 ) ÷ 249] x 100 = 81.93%
Formula
Percentage change = [(453 - 249) / 249] x 100
Subtract the new number by the original number
453 - 249 = 204
204 ÷ 249 = 0.8192771084337349
0.8192771084337349 x 100 = 81.93%