34.05% is the change from 511 to 685
Calculation steps:
[( 685 - 511 ) ÷ 511] x 100 = 34.05%
Formula
Percentage change = [(685 - 511) / 511] x 100
Subtract the new number by the original number
685 - 511 = 174
174 ÷ 511 = 0.3405088062622309
0.3405088062622309 x 100 = 34.05%