-92.42% is the change from 871 to 66
Calculation steps:
[( 66 - 871 ) ÷ 871] x 100 = -92.42%
Formula
Percentage change = [(66 - 871) / 871] x 100
Subtract the new number by the original number
66 - 871 = -805
-805 ÷ 871 = -0.9242250287026407
-0.9242250287026407 x 100 = -92.42%