-48.87% is the change from 266 to 136
Calculation steps:
[( 136 - 266 ) ÷ 266] x 100 = -48.87%
Formula
Percentage change = [(136 - 266) / 266] x 100
Subtract the new number by the original number
136 - 266 = -130
-130 ÷ 266 = -0.48872180451127817
-0.48872180451127817 x 100 = -48.87%