-2.12% is the change from 897 to 878
Calculation steps:
[( 878 - 897 ) ÷ 897] x 100 = -2.12%
Formula
Percentage change = [(878 - 897) / 897] x 100
Subtract the new number by the original number
878 - 897 = -19
-19 ÷ 897 = -0.021181716833890748
-0.021181716833890748 x 100 = -2.12%