-31.5% is the change from 273 to 187
Calculation steps:
[( 187 - 273 ) ÷ 273] x 100 = -31.5%
Formula
Percentage change = [(187 - 273) / 273] x 100
Subtract the new number by the original number
187 - 273 = -86
-86 ÷ 273 = -0.315018315018315
-0.315018315018315 x 100 = -31.5%