-50.74% is the change from 540 to 266
Calculation steps:
[( 266 - 540 ) ÷ 540] x 100 = -50.74%
Formula
Percentage change = [(266 - 540) / 540] x 100
Subtract the new number by the original number
266 - 540 = -274
-274 ÷ 540 = -0.5074074074074074
-0.5074074074074074 x 100 = -50.74%