-99.71% is the change from 687 to 2
Calculation steps:
[( 2 - 687 ) ÷ 687] x 100 = -99.71%
Formula
Percentage change = [(2 - 687) / 687] x 100
Subtract the new number by the original number
2 - 687 = -685
-685 ÷ 687 = -0.9970887918486172
-0.9970887918486172 x 100 = -99.71%