-36.05% is the change from 860 to 550
Calculation steps:
[( 550 - 860 ) ÷ 860] x 100 = -36.05%
Formula
Percentage change = [(550 - 860) / 860] x 100
Subtract the new number by the original number
550 - 860 = -310
-310 ÷ 860 = -0.36046511627906974
-0.36046511627906974 x 100 = -36.05%