-71.54% is the change from 671 to 191
Calculation steps:
[( 191 - 671 ) ÷ 671] x 100 = -71.54%
Formula
Percentage change = [(191 - 671) / 671] x 100
Subtract the new number by the original number
191 - 671 = -480
-480 ÷ 671 = -0.7153502235469449
-0.7153502235469449 x 100 = -71.54%