-60.93% is the change from 668 to 261
Calculation steps:
[( 261 - 668 ) ÷ 668] x 100 = -60.93%
Formula
Percentage change = [(261 - 668) / 668] x 100
Subtract the new number by the original number
261 - 668 = -407
-407 ÷ 668 = -0.6092814371257484
-0.6092814371257484 x 100 = -60.93%