-5.99% is the change from 851 to 800
Calculation steps:
[( 800 - 851 ) ÷ 851] x 100 = -5.99%
Formula
Percentage change = [(800 - 851) / 851] x 100
Subtract the new number by the original number
800 - 851 = -51
-51 ÷ 851 = -0.05992949471210341
-0.05992949471210341 x 100 = -5.99%