-70.22% is the change from 863 to 257
Calculation steps:
[( 257 - 863 ) ÷ 863] x 100 = -70.22%
Formula
Percentage change = [(257 - 863) / 863] x 100
Subtract the new number by the original number
257 - 863 = -606
-606 ÷ 863 = -0.7022016222479722
-0.7022016222479722 x 100 = -70.22%