-30.53% is the change from 750 to 521
Calculation steps:
[( 521 - 750 ) ÷ 750] x 100 = -30.53%
Formula
Percentage change = [(521 - 750) / 750] x 100
Subtract the new number by the original number
521 - 750 = -229
-229 ÷ 750 = -0.30533333333333335
-0.30533333333333335 x 100 = -30.53%