-87.86% is the change from 280 to 34
Calculation steps:
[( 34 - 280 ) ÷ 280] x 100 = -87.86%
Formula
Percentage change = [(34 - 280) / 280] x 100
Subtract the new number by the original number
34 - 280 = -246
-246 ÷ 280 = -0.8785714285714286
-0.8785714285714286 x 100 = -87.86%