-68.84% is the change from 690 to 215
Calculation steps:
[( 215 - 690 ) ÷ 690] x 100 = -68.84%
Formula
Percentage change = [(215 - 690) / 690] x 100
Subtract the new number by the original number
215 - 690 = -475
-475 ÷ 690 = -0.6884057971014492
-0.6884057971014492 x 100 = -68.84%