-66.28% is the change from 860 to 290
Calculation steps:
[( 290 - 860 ) ÷ 860] x 100 = -66.28%
Formula
Percentage change = [(290 - 860) / 860] x 100
Subtract the new number by the original number
290 - 860 = -570
-570 ÷ 860 = -0.6627906976744186
-0.6627906976744186 x 100 = -66.28%