-71.57% is the change from 897 to 255
Calculation steps:
[( 255 - 897 ) ÷ 897] x 100 = -71.57%
Formula
Percentage change = [(255 - 897) / 897] x 100
Subtract the new number by the original number
255 - 897 = -642
-642 ÷ 897 = -0.7157190635451505
-0.7157190635451505 x 100 = -71.57%