-73.02% is the change from 949 to 256
Calculation steps:
[( 256 - 949 ) ÷ 949] x 100 = -73.02%
Formula
Percentage change = [(256 - 949) / 949] x 100
Subtract the new number by the original number
256 - 949 = -693
-693 ÷ 949 = -0.7302423603793466
-0.7302423603793466 x 100 = -73.02%