-65.93% is the change from 631 to 215
Calculation steps:
[( 215 - 631 ) ÷ 631] x 100 = -65.93%
Formula
Percentage change = [(215 - 631) / 631] x 100
Subtract the new number by the original number
215 - 631 = -416
-416 ÷ 631 = -0.659270998415214
-0.659270998415214 x 100 = -65.93%