92.14% is the change from 509 to 978
Calculation steps:
[( 978 - 509 ) ÷ 509] x 100 = 92.14%
Formula
Percentage change = [(978 - 509) / 509] x 100
Subtract the new number by the original number
978 - 509 = 469
469 ÷ 509 = 0.9214145383104125
0.9214145383104125 x 100 = 92.14%