-51.34% is the change from 187 to 91
Calculation steps:
[( 91 - 187 ) ÷ 187] x 100 = -51.34%
Formula
Percentage change = [(91 - 187) / 187] x 100
Subtract the new number by the original number
91 - 187 = -96
-96 ÷ 187 = -0.5133689839572193
-0.5133689839572193 x 100 = -51.34%