-66.23% is the change from 758 to 256
Calculation steps:
[( 256 - 758 ) ÷ 758] x 100 = -66.23%
Formula
Percentage change = [(256 - 758) / 758] x 100
Subtract the new number by the original number
256 - 758 = -502
-502 ÷ 758 = -0.662269129287599
-0.662269129287599 x 100 = -66.23%