-49.05% is the change from 838 to 427
Calculation steps:
[( 427 - 838 ) ÷ 838] x 100 = -49.05%
Formula
Percentage change = [(427 - 838) / 838] x 100
Subtract the new number by the original number
427 - 838 = -411
-411 ÷ 838 = -0.4904534606205251
-0.4904534606205251 x 100 = -49.05%