-78.07% is the change from 871 to 191
Calculation steps:
[( 191 - 871 ) ÷ 871] x 100 = -78.07%
Formula
Percentage change = [(191 - 871) / 871] x 100
Subtract the new number by the original number
191 - 871 = -680
-680 ÷ 871 = -0.7807118254879449
-0.7807118254879449 x 100 = -78.07%