-81.44% is the change from 668 to 124
Calculation steps:
[( 124 - 668 ) ÷ 668] x 100 = -81.44%
Formula
Percentage change = [(124 - 668) / 668] x 100
Subtract the new number by the original number
124 - 668 = -544
-544 ÷ 668 = -0.8143712574850299
-0.8143712574850299 x 100 = -81.44%