-47% is the change from 851 to 451
Calculation steps:
[( 451 - 851 ) ÷ 851] x 100 = -47%
Formula
Percentage change = [(451 - 851) / 851] x 100
Subtract the new number by the original number
451 - 851 = -400
-400 ÷ 851 = -0.4700352526439483
-0.4700352526439483 x 100 = -47%