-71.67% is the change from 233 to 66
Calculation steps:
[( 66 - 233 ) ÷ 233] x 100 = -71.67%
Formula
Percentage change = [(66 - 233) / 233] x 100
Subtract the new number by the original number
66 - 233 = -167
-167 ÷ 233 = -0.7167381974248928
-0.7167381974248928 x 100 = -71.67%