-30.81% is the change from 753 to 521
Calculation steps:
[( 521 - 753 ) ÷ 753] x 100 = -30.81%
Formula
Percentage change = [(521 - 753) / 753] x 100
Subtract the new number by the original number
521 - 753 = -232
-232 ÷ 753 = -0.30810092961487384
-0.30810092961487384 x 100 = -30.81%