-49.82% is the change from 851 to 427
Calculation steps:
[( 427 - 851 ) ÷ 851] x 100 = -49.82%
Formula
Percentage change = [(427 - 851) / 851] x 100
Subtract the new number by the original number
427 - 851 = -424
-424 ÷ 851 = -0.4982373678025852
-0.4982373678025852 x 100 = -49.82%