-60.96% is the change from 871 to 340
Calculation steps:
[( 340 - 871 ) ÷ 871] x 100 = -60.96%
Formula
Percentage change = [(340 - 871) / 871] x 100
Subtract the new number by the original number
340 - 871 = -531
-531 ÷ 871 = -0.6096440872560276
-0.6096440872560276 x 100 = -60.96%