6.38% is the change from 800 to 851
Calculation steps:
[( 851 - 800 ) ÷ 800] x 100 = 6.38%
Formula
Percentage change = [(851 - 800) / 800] x 100
Subtract the new number by the original number
851 - 800 = 51
51 ÷ 800 = 0.06375
0.06375 x 100 = 6.38%
Example