-42.57% is the change from 855 to 491
Calculation steps:
[( 491 - 855 ) ÷ 855] x 100 = -42.57%
Formula
Percentage change = [(491 - 855) / 855] x 100
Subtract the new number by the original number
491 - 855 = -364
-364 ÷ 855 = -0.4257309941520468
-0.4257309941520468 x 100 = -42.57%