91.94% is the change from 509 to 977
Calculation steps:
[( 977 - 509 ) ÷ 509] x 100 = 91.94%
Formula
Percentage change = [(977 - 509) / 509] x 100
Subtract the new number by the original number
977 - 509 = 468
468 ÷ 509 = 0.9194499017681729
0.9194499017681729 x 100 = 91.94%