-54.51% is the change from 831 to 378
Calculation steps:
[( 378 - 831 ) ÷ 831] x 100 = -54.51%
Formula
Percentage change = [(378 - 831) / 831] x 100
Subtract the new number by the original number
378 - 831 = -453
-453 ÷ 831 = -0.5451263537906137
-0.5451263537906137 x 100 = -54.51%