-44% is the change from 750 to 420
Calculation steps:
[( 420 - 750 ) ÷ 750] x 100 = -44%
Formula
Percentage change = [(420 - 750) / 750] x 100
Subtract the new number by the original number
420 - 750 = -330
-330 ÷ 750 = -0.44
-0.44 x 100 = -44%
Example