-20.09% is the change from 234 to 187
Calculation steps:
[( 187 - 234 ) ÷ 234] x 100 = -20.09%
Formula
Percentage change = [(187 - 234) / 234] x 100
Subtract the new number by the original number
187 - 234 = -47
-47 ÷ 234 = -0.20085470085470086
-0.20085470085470086 x 100 = -20.09%