-53.76% is the change from 266 to 123
Calculation steps:
[( 123 - 266 ) ÷ 266] x 100 = -53.76%
Formula
Percentage change = [(123 - 266) / 266] x 100
Subtract the new number by the original number
123 - 266 = -143
-143 ÷ 266 = -0.5375939849624061
-0.5375939849624061 x 100 = -53.76%