-25.14% is the change from 863 to 646
Calculation steps:
[( 646 - 863 ) ÷ 863] x 100 = -25.14%
Formula
Percentage change = [(646 - 863) / 863] x 100
Subtract the new number by the original number
646 - 863 = -217
-217 ÷ 863 = -0.2514484356894554
-0.2514484356894554 x 100 = -25.14%