-89.71% is the change from 690 to 71
Calculation steps:
[( 71 - 690 ) ÷ 690] x 100 = -89.71%
Formula
Percentage change = [(71 - 690) / 690] x 100
Subtract the new number by the original number
71 - 690 = -619
-619 ÷ 690 = -0.8971014492753623
-0.8971014492753623 x 100 = -89.71%