-54.25% is the change from 671 to 307
Calculation steps:
[( 307 - 671 ) ÷ 671] x 100 = -54.25%
Formula
Percentage change = [(307 - 671) / 671] x 100
Subtract the new number by the original number
307 - 671 = -364
-364 ÷ 671 = -0.5424739195230999
-0.5424739195230999 x 100 = -54.25%