-7.13% is the change from 561 to 521
Calculation steps:
[( 521 - 561 ) ÷ 561] x 100 = -7.13%
Formula
Percentage change = [(521 - 561) / 561] x 100
Subtract the new number by the original number
521 - 561 = -40
-40 ÷ 561 = -0.07130124777183601
-0.07130124777183601 x 100 = -7.13%