-68.39% is the change from 870 to 275
Calculation steps:
[( 275 - 870 ) ÷ 870] x 100 = -68.39%
Formula
Percentage change = [(275 - 870) / 870] x 100
Subtract the new number by the original number
275 - 870 = -595
-595 ÷ 870 = -0.6839080459770115
-0.6839080459770115 x 100 = -68.39%