-82.86% is the change from 671 to 115
Calculation steps:
[( 115 - 671 ) ÷ 671] x 100 = -82.86%
Formula
Percentage change = [(115 - 671) / 671] x 100
Subtract the new number by the original number
115 - 671 = -556
-556 ÷ 671 = -0.8286140089418778
-0.8286140089418778 x 100 = -82.86%