-29.74% is the change from 871 to 612
Calculation steps:
[( 612 - 871 ) ÷ 871] x 100 = -29.74%
Formula
Percentage change = [(612 - 871) / 871] x 100
Subtract the new number by the original number
612 - 871 = -259
-259 ÷ 871 = -0.2973593570608496
-0.2973593570608496 x 100 = -29.74%