-40.93% is the change from 838 to 495
Calculation steps:
[( 495 - 838 ) ÷ 838] x 100 = -40.93%
Formula
Percentage change = [(495 - 838) / 838] x 100
Subtract the new number by the original number
495 - 838 = -343
-343 ÷ 838 = -0.40930787589498807
-0.40930787589498807 x 100 = -40.93%