-41.6% is the change from 851 to 497
Calculation steps:
[( 497 - 851 ) ÷ 851] x 100 = -41.6%
Formula
Percentage change = [(497 - 851) / 851] x 100
Subtract the new number by the original number
497 - 851 = -354
-354 ÷ 851 = -0.41598119858989424
-0.41598119858989424 x 100 = -41.6%