-71.91% is the change from 680 to 191
Calculation steps:
[( 191 - 680 ) ÷ 680] x 100 = -71.91%
Formula
Percentage change = [(191 - 680) / 680] x 100
Subtract the new number by the original number
191 - 680 = -489
-489 ÷ 680 = -0.7191176470588235
-0.7191176470588235 x 100 = -71.91%