-71.87% is the change from 910 to 256
Calculation steps:
[( 256 - 910 ) ÷ 910] x 100 = -71.87%
Formula
Percentage change = [(256 - 910) / 910] x 100
Subtract the new number by the original number
256 - 910 = -654
-654 ÷ 910 = -0.7186813186813187
-0.7186813186813187 x 100 = -71.87%