-4.5% is the change from 800 to 764
Calculation steps:
[( 764 - 800 ) ÷ 800] x 100 = -4.5%
Formula
Percentage change = [(764 - 800) / 800] x 100
Subtract the new number by the original number
764 - 800 = -36
-36 ÷ 800 = -0.045
-0.045 x 100 = -4.5%
Example