52.85% is the change from 509 to 778
Calculation steps:
[( 778 - 509 ) ÷ 509] x 100 = 52.85%
Formula
Percentage change = [(778 - 509) / 509] x 100
Subtract the new number by the original number
778 - 509 = 269
269 ÷ 509 = 0.5284872298624754
0.5284872298624754 x 100 = 52.85%