-49.04% is the change from 520 to 265
Calculation steps:
[( 265 - 520 ) ÷ 520] x 100 = -49.04%
Formula
Percentage change = [(265 - 520) / 520] x 100
Subtract the new number by the original number
265 - 520 = -255
-255 ÷ 520 = -0.49038461538461536
-0.49038461538461536 x 100 = -49.04%