91.21% is the change from 455 to 870
Calculation steps:
[( 870 - 455 ) ÷ 455] x 100 = 91.21%
Formula
Percentage change = [(870 - 455) / 455] x 100
Subtract the new number by the original number
870 - 455 = 415
415 ÷ 455 = 0.9120879120879121
0.9120879120879121 x 100 = 91.21%