-31.87% is the change from 750 to 511
Calculation steps:
[( 511 - 750 ) ÷ 750] x 100 = -31.87%
Formula
Percentage change = [(511 - 750) / 750] x 100
Subtract the new number by the original number
511 - 750 = -239
-239 ÷ 750 = -0.31866666666666665
-0.31866666666666665 x 100 = -31.87%