90.87% is the change from 449 to 857
Calculation steps:
[( 857 - 449 ) ÷ 449] x 100 = 90.87%
Formula
Percentage change = [(857 - 449) / 449] x 100
Subtract the new number by the original number
857 - 449 = 408
408 ÷ 449 = 0.9086859688195991
0.9086859688195991 x 100 = 90.87%