-33.42% is the change from 766 to 510
Calculation steps:
[( 510 - 766 ) ÷ 766] x 100 = -33.42%
Formula
Percentage change = [(510 - 766) / 766] x 100
Subtract the new number by the original number
510 - 766 = -256
-256 ÷ 766 = -0.3342036553524804
-0.3342036553524804 x 100 = -33.42%