67.71% is the change from 511 to 857
Calculation steps:
[( 857 - 511 ) ÷ 511] x 100 = 67.71%
Formula
Percentage change = [(857 - 511) / 511] x 100
Subtract the new number by the original number
857 - 511 = 346
346 ÷ 511 = 0.6771037181996086
0.6771037181996086 x 100 = 67.71%