-50.55% is the change from 275 to 136
Calculation steps:
[( 136 - 275 ) ÷ 275] x 100 = -50.55%
Formula
Percentage change = [(136 - 275) / 275] x 100
Subtract the new number by the original number
136 - 275 = -139
-139 ÷ 275 = -0.5054545454545455
-0.5054545454545455 x 100 = -50.55%