-11.24% is the change from 587 to 521
Calculation steps:
[( 521 - 587 ) ÷ 587] x 100 = -11.24%
Formula
Percentage change = [(521 - 587) / 587] x 100
Subtract the new number by the original number
521 - 587 = -66
-66 ÷ 587 = -0.11243611584327087
-0.11243611584327087 x 100 = -11.24%