-70.49% is the change from 671 to 198
Calculation steps:
[( 198 - 671 ) ÷ 671] x 100 = -70.49%
Formula
Percentage change = [(198 - 671) / 671] x 100
Subtract the new number by the original number
198 - 671 = -473
-473 ÷ 671 = -0.7049180327868853
-0.7049180327868853 x 100 = -70.49%