-69.67% is the change from 666 to 202
Calculation steps:
[( 202 - 666 ) ÷ 666] x 100 = -69.67%
Formula
Percentage change = [(202 - 666) / 666] x 100
Subtract the new number by the original number
202 - 666 = -464
-464 ÷ 666 = -0.6966966966966966
-0.6966966966966966 x 100 = -69.67%