-50.48% is the change from 838 to 415
Calculation steps:
[( 415 - 838 ) ÷ 838] x 100 = -50.48%
Formula
Percentage change = [(415 - 838) / 838] x 100
Subtract the new number by the original number
415 - 838 = -423
-423 ÷ 838 = -0.5047732696897375
-0.5047732696897375 x 100 = -50.48%