34.97% is the change from 509 to 687
Calculation steps:
[( 687 - 509 ) ÷ 509] x 100 = 34.97%
Formula
Percentage change = [(687 - 509) / 509] x 100
Subtract the new number by the original number
687 - 509 = 178
178 ÷ 509 = 0.34970530451866405
0.34970530451866405 x 100 = 34.97%