70.53% is the change from 509 to 868
Calculation steps:
[( 868 - 509 ) ÷ 509] x 100 = 70.53%
Formula
Percentage change = [(868 - 509) / 509] x 100
Subtract the new number by the original number
868 - 509 = 359
359 ÷ 509 = 0.7053045186640472
0.7053045186640472 x 100 = 70.53%