-39.72% is the change from 851 to 513
Calculation steps:
[( 513 - 851 ) ÷ 851] x 100 = -39.72%
Formula
Percentage change = [(513 - 851) / 851] x 100
Subtract the new number by the original number
513 - 851 = -338
-338 ÷ 851 = -0.3971797884841363
-0.3971797884841363 x 100 = -39.72%