-91.8% is the change from 671 to 55
Calculation steps:
[( 55 - 671 ) ÷ 671] x 100 = -91.8%
Formula
Percentage change = [(55 - 671) / 671] x 100
Subtract the new number by the original number
55 - 671 = -616
-616 ÷ 671 = -0.9180327868852459
-0.9180327868852459 x 100 = -91.8%