-51.01% is the change from 543 to 266
Calculation steps:
[( 266 - 543 ) ÷ 543] x 100 = -51.01%
Formula
Percentage change = [(266 - 543) / 543] x 100
Subtract the new number by the original number
266 - 543 = -277
-277 ÷ 543 = -0.5101289134438306
-0.5101289134438306 x 100 = -51.01%