-91.51% is the change from 671 to 57
Calculation steps:
[( 57 - 671 ) ÷ 671] x 100 = -91.51%
Formula
Percentage change = [(57 - 671) / 671] x 100
Subtract the new number by the original number
57 - 671 = -614
-614 ÷ 671 = -0.9150521609538003
-0.9150521609538003 x 100 = -91.51%