67.39% is the change from 509 to 852
Calculation steps:
[( 852 - 509 ) ÷ 509] x 100 = 67.39%
Formula
Percentage change = [(852 - 509) / 509] x 100
Subtract the new number by the original number
852 - 509 = 343
343 ÷ 509 = 0.6738703339882122
0.6738703339882122 x 100 = 67.39%