-69.82% is the change from 666 to 201
Calculation steps:
[( 201 - 666 ) ÷ 666] x 100 = -69.82%
Formula
Percentage change = [(201 - 666) / 666] x 100
Subtract the new number by the original number
201 - 666 = -465
-465 ÷ 666 = -0.6981981981981982
-0.6981981981981982 x 100 = -69.82%