-50.56% is the change from 538 to 266
Calculation steps:
[( 266 - 538 ) ÷ 538] x 100 = -50.56%
Formula
Percentage change = [(266 - 538) / 538] x 100
Subtract the new number by the original number
266 - 538 = -272
-272 ÷ 538 = -0.5055762081784386
-0.5055762081784386 x 100 = -50.56%