-57.76% is the change from 606 to 256
Calculation steps:
[( 256 - 606 ) ÷ 606] x 100 = -57.76%
Formula
Percentage change = [(256 - 606) / 606] x 100
Subtract the new number by the original number
256 - 606 = -350
-350 ÷ 606 = -0.5775577557755776
-0.5775577557755776 x 100 = -57.76%