-65.15% is the change from 66 to 23
Calculation steps:
[( 23 - 66 ) ÷ 66] x 100 = -65.15%
Formula
Percentage change = [(23 - 66) / 66] x 100
Subtract the new number by the original number
23 - 66 = -43
-43 ÷ 66 = -0.6515151515151515
-0.6515151515151515 x 100 = -65.15%