4.42% is the change from 815 to 851
Calculation steps:
[( 851 - 815 ) ÷ 815] x 100 = 4.42%
Formula
Percentage change = [(851 - 815) / 815] x 100
Subtract the new number by the original number
851 - 815 = 36
36 ÷ 815 = 0.044171779141104296
0.044171779141104296 x 100 = 4.42%