-96.9% is the change from 871 to 27
Calculation steps:
[( 27 - 871 ) ÷ 871] x 100 = -96.9%
Formula
Percentage change = [(27 - 871) / 871] x 100
Subtract the new number by the original number
27 - 871 = -844
-844 ÷ 871 = -0.9690011481056258
-0.9690011481056258 x 100 = -96.9%