-93.54% is the change from 666 to 43
Calculation steps:
[( 43 - 666 ) ÷ 666] x 100 = -93.54%
Formula
Percentage change = [(43 - 666) / 666] x 100
Subtract the new number by the original number
43 - 666 = -623
-623 ÷ 666 = -0.9354354354354354
-0.9354354354354354 x 100 = -93.54%