-38.54% is the change from 838 to 515
Calculation steps:
[( 515 - 838 ) ÷ 838] x 100 = -38.54%
Formula
Percentage change = [(515 - 838) / 838] x 100
Subtract the new number by the original number
515 - 838 = -323
-323 ÷ 838 = -0.3854415274463007
-0.3854415274463007 x 100 = -38.54%