53.44% is the change from 509 to 781
Calculation steps:
[( 781 - 509 ) ÷ 509] x 100 = 53.44%
Formula
Percentage change = [(781 - 509) / 509] x 100
Subtract the new number by the original number
781 - 509 = 272
272 ÷ 509 = 0.5343811394891945
0.5343811394891945 x 100 = 53.44%