-61.08% is the change from 668 to 260
Calculation steps:
[( 260 - 668 ) ÷ 668] x 100 = -61.08%
Formula
Percentage change = [(260 - 668) / 668] x 100
Subtract the new number by the original number
260 - 668 = -408
-408 ÷ 668 = -0.6107784431137725
-0.6107784431137725 x 100 = -61.08%