-12.31% is the change from 520 to 456
Calculation steps:
[( 456 - 520 ) ÷ 520] x 100 = -12.31%
Formula
Percentage change = [(456 - 520) / 520] x 100
Subtract the new number by the original number
456 - 520 = -64
-64 ÷ 520 = -0.12307692307692308
-0.12307692307692308 x 100 = -12.31%