-66.49% is the change from 764 to 256
Calculation steps:
[( 256 - 764 ) ÷ 764] x 100 = -66.49%
Formula
Percentage change = [(256 - 764) / 764] x 100
Subtract the new number by the original number
256 - 764 = -508
-508 ÷ 764 = -0.6649214659685864
-0.6649214659685864 x 100 = -66.49%