-99.71% is the change from 691 to 2
Calculation steps:
[( 2 - 691 ) ÷ 691] x 100 = -99.71%
Formula
Percentage change = [(2 - 691) / 691] x 100
Subtract the new number by the original number
2 - 691 = -689
-689 ÷ 691 = -0.9971056439942113
-0.9971056439942113 x 100 = -99.71%