95.87% is the change from 509 to 997
Calculation steps:
[( 997 - 509 ) ÷ 509] x 100 = 95.87%
Formula
Percentage change = [(997 - 509) / 509] x 100
Subtract the new number by the original number
997 - 509 = 488
488 ÷ 509 = 0.9587426326129665
0.9587426326129665 x 100 = 95.87%