86.64% is the change from 509 to 950
Calculation steps:
[( 950 - 509 ) ÷ 509] x 100 = 86.64%
Formula
Percentage change = [(950 - 509) / 509] x 100
Subtract the new number by the original number
950 - 509 = 441
441 ÷ 509 = 0.8664047151277013
0.8664047151277013 x 100 = 86.64%