-76.28% is the change from 666 to 158
Calculation steps:
[( 158 - 666 ) ÷ 666] x 100 = -76.28%
Formula
Percentage change = [(158 - 666) / 666] x 100
Subtract the new number by the original number
158 - 666 = -508
-508 ÷ 666 = -0.7627627627627628
-0.7627627627627628 x 100 = -76.28%