-84.35% is the change from 671 to 105
Calculation steps:
[( 105 - 671 ) ÷ 671] x 100 = -84.35%
Formula
Percentage change = [(105 - 671) / 671] x 100
Subtract the new number by the original number
105 - 671 = -566
-566 ÷ 671 = -0.8435171385991058
-0.8435171385991058 x 100 = -84.35%