-40.53% is the change from 876 to 521
Calculation steps:
[( 521 - 876 ) ÷ 876] x 100 = -40.53%
Formula
Percentage change = [(521 - 876) / 876] x 100
Subtract the new number by the original number
521 - 876 = -355
-355 ÷ 876 = -0.4052511415525114
-0.4052511415525114 x 100 = -40.53%