-33.29% is the change from 766 to 511
Calculation steps:
[( 511 - 766 ) ÷ 766] x 100 = -33.29%
Formula
Percentage change = [(511 - 766) / 766] x 100
Subtract the new number by the original number
511 - 766 = -255
-255 ÷ 766 = -0.3328981723237598
-0.3328981723237598 x 100 = -33.29%