-68.77% is the change from 666 to 208
Calculation steps:
[( 208 - 666 ) ÷ 666] x 100 = -68.77%
Formula
Percentage change = [(208 - 666) / 666] x 100
Subtract the new number by the original number
208 - 666 = -458
-458 ÷ 666 = -0.6876876876876877
-0.6876876876876877 x 100 = -68.77%