-56.73% is the change from 520 to 225
Calculation steps:
[( 225 - 520 ) ÷ 520] x 100 = -56.73%
Formula
Percentage change = [(225 - 520) / 520] x 100
Subtract the new number by the original number
225 - 520 = -295
-295 ÷ 520 = -0.5673076923076923
-0.5673076923076923 x 100 = -56.73%