-6.47% is the change from 897 to 839
Calculation steps:
[( 839 - 897 ) ÷ 897] x 100 = -6.47%
Formula
Percentage change = [(839 - 897) / 897] x 100
Subtract the new number by the original number
839 - 897 = -58
-58 ÷ 897 = -0.06465997770345597
-0.06465997770345597 x 100 = -6.47%