-0.76% is the change from 525 to 521
Calculation steps:
[( 521 - 525 ) ÷ 525] x 100 = -0.76%
Formula
Percentage change = [(521 - 525) / 525] x 100
Subtract the new number by the original number
521 - 525 = -4
-4 ÷ 525 = -0.007619047619047619
-0.007619047619047619 x 100 = -0.76%