828.57% is the change from 49 to 455
Calculation steps:
[( 455 - 49 ) ÷ 49] x 100 = 828.57%
Formula
Percentage change = [(455 - 49) / 49] x 100
Subtract the new number by the original number
455 - 49 = 406
406 ÷ 49 = 8.285714285714286
8.285714285714286 x 100 = 828.57%