-99.71% is the change from 690 to 2
Calculation steps:
[( 2 - 690 ) ÷ 690] x 100 = -99.71%
Formula
Percentage change = [(2 - 690) / 690] x 100
Subtract the new number by the original number
2 - 690 = -688
-688 ÷ 690 = -0.9971014492753624
-0.9971014492753624 x 100 = -99.71%