-31.03% is the change from 838 to 578
Calculation steps:
[( 578 - 838 ) ÷ 838] x 100 = -31.03%
Formula
Percentage change = [(578 - 838) / 838] x 100
Subtract the new number by the original number
578 - 838 = -260
-260 ÷ 838 = -0.31026252983293556
-0.31026252983293556 x 100 = -31.03%