-68.12% is the change from 207 to 66
Calculation steps:
[( 66 - 207 ) ÷ 207] x 100 = -68.12%
Formula
Percentage change = [(66 - 207) / 207] x 100
Subtract the new number by the original number
66 - 207 = -141
-141 ÷ 207 = -0.6811594202898551
-0.6811594202898551 x 100 = -68.12%