-70.87% is the change from 666 to 194
Calculation steps:
[( 194 - 666 ) ÷ 666] x 100 = -70.87%
Formula
Percentage change = [(194 - 666) / 666] x 100
Subtract the new number by the original number
194 - 666 = -472
-472 ÷ 666 = -0.7087087087087087
-0.7087087087087087 x 100 = -70.87%