76.82% is the change from 509 to 900
Calculation steps:
[( 900 - 509 ) ÷ 509] x 100 = 76.82%
Formula
Percentage change = [(900 - 509) / 509] x 100
Subtract the new number by the original number
900 - 509 = 391
391 ÷ 509 = 0.768172888015717
0.768172888015717 x 100 = 76.82%