67.12% is the change from 511 to 854
Calculation steps:
[( 854 - 511 ) ÷ 511] x 100 = 67.12%
Formula
Percentage change = [(854 - 511) / 511] x 100
Subtract the new number by the original number
854 - 511 = 343
343 ÷ 511 = 0.6712328767123288
0.6712328767123288 x 100 = 67.12%