-3.5% is the change from 800 to 772
Calculation steps:
[( 772 - 800 ) ÷ 800] x 100 = -3.5%
Formula
Percentage change = [(772 - 800) / 800] x 100
Subtract the new number by the original number
772 - 800 = -28
-28 ÷ 800 = -0.035
-0.035 x 100 = -3.5%
Example