-68.27% is the change from 208 to 66
Calculation steps:
[( 66 - 208 ) ÷ 208] x 100 = -68.27%
Formula
Percentage change = [(66 - 208) / 208] x 100
Subtract the new number by the original number
66 - 208 = -142
-142 ÷ 208 = -0.6826923076923077
-0.6826923076923077 x 100 = -68.27%