81.18% is the change from 457 to 828
Calculation steps:
[( 828 - 457 ) ÷ 457] x 100 = 81.18%
Formula
Percentage change = [(828 - 457) / 457] x 100
Subtract the new number by the original number
828 - 457 = 371
371 ÷ 457 = 0.811816192560175
0.811816192560175 x 100 = 81.18%