-67.85% is the change from 871 to 280
Calculation steps:
[( 280 - 871 ) ÷ 871] x 100 = -67.85%
Formula
Percentage change = [(280 - 871) / 871] x 100
Subtract the new number by the original number
280 - 871 = -591
-591 ÷ 871 = -0.6785304247990815
-0.6785304247990815 x 100 = -67.85%