-27.98% is the change from 897 to 646
Calculation steps:
[( 646 - 897 ) ÷ 897] x 100 = -27.98%
Formula
Percentage change = [(646 - 897) / 897] x 100
Subtract the new number by the original number
646 - 897 = -251
-251 ÷ 897 = -0.2798216276477146
-0.2798216276477146 x 100 = -27.98%