51.68% is the change from 505 to 766
Calculation steps:
[( 766 - 505 ) ÷ 505] x 100 = 51.68%
Formula
Percentage change = [(766 - 505) / 505] x 100
Subtract the new number by the original number
766 - 505 = 261
261 ÷ 505 = 0.5168316831683168
0.5168316831683168 x 100 = 51.68%