-52.31% is the change from 520 to 248
Calculation steps:
[( 248 - 520 ) ÷ 520] x 100 = -52.31%
Formula
Percentage change = [(248 - 520) / 520] x 100
Subtract the new number by the original number
248 - 520 = -272
-272 ÷ 520 = -0.5230769230769231
-0.5230769230769231 x 100 = -52.31%