-67.01% is the change from 776 to 256
Calculation steps:
[( 256 - 776 ) ÷ 776] x 100 = -67.01%
Formula
Percentage change = [(256 - 776) / 776] x 100
Subtract the new number by the original number
256 - 776 = -520
-520 ÷ 776 = -0.6701030927835051
-0.6701030927835051 x 100 = -67.01%