-33.2% is the change from 750 to 501
Calculation steps:
[( 501 - 750 ) ÷ 750] x 100 = -33.2%
Formula
Percentage change = [(501 - 750) / 750] x 100
Subtract the new number by the original number
501 - 750 = -249
-249 ÷ 750 = -0.332
-0.332 x 100 = -33.2%