-31.37% is the change from 800 to 549
Calculation steps:
[( 549 - 800 ) ÷ 800] x 100 = -31.37%
Formula
Percentage change = [(549 - 800) / 800] x 100
Subtract the new number by the original number
549 - 800 = -251
-251 ÷ 800 = -0.31375
-0.31375 x 100 = -31.37%