-87.7% is the change from 187 to 23
Calculation steps:
[( 23 - 187 ) ÷ 187] x 100 = -87.7%
Formula
Percentage change = [(23 - 187) / 187] x 100
Subtract the new number by the original number
23 - 187 = -164
-164 ÷ 187 = -0.8770053475935828
-0.8770053475935828 x 100 = -87.7%