-54.51% is the change from 266 to 121
Calculation steps:
[( 121 - 266 ) ÷ 266] x 100 = -54.51%
Formula
Percentage change = [(121 - 266) / 266] x 100
Subtract the new number by the original number
121 - 266 = -145
-145 ÷ 266 = -0.5451127819548872
-0.5451127819548872 x 100 = -54.51%