-68.38% is the change from 680 to 215
Calculation steps:
[( 215 - 680 ) ÷ 680] x 100 = -68.38%
Formula
Percentage change = [(215 - 680) / 680] x 100
Subtract the new number by the original number
215 - 680 = -465
-465 ÷ 680 = -0.6838235294117647
-0.6838235294117647 x 100 = -68.38%