91.55% is the change from 509 to 975
Calculation steps:
[( 975 - 509 ) ÷ 509] x 100 = 91.55%
Formula
Percentage change = [(975 - 509) / 509] x 100
Subtract the new number by the original number
975 - 509 = 466
466 ÷ 509 = 0.9155206286836935
0.9155206286836935 x 100 = 91.55%