-6.38% is the change from 800 to 749
Calculation steps:
[( 749 - 800 ) ÷ 800] x 100 = -6.38%
Formula
Percentage change = [(749 - 800) / 800] x 100
Subtract the new number by the original number
749 - 800 = -51
-51 ÷ 800 = -0.06375
-0.06375 x 100 = -6.38%