-51.09% is the change from 276 to 135
Calculation steps:
[( 135 - 276 ) ÷ 276] x 100 = -51.09%
Formula
Percentage change = [(135 - 276) / 276] x 100
Subtract the new number by the original number
135 - 276 = -141
-141 ÷ 276 = -0.5108695652173914
-0.5108695652173914 x 100 = -51.09%