6.13% is the change from 815 to 865
Calculation steps:
[( 865 - 815 ) ÷ 815] x 100 = 6.13%
Formula
Percentage change = [(865 - 815) / 815] x 100
Subtract the new number by the original number
865 - 815 = 50
50 ÷ 815 = 0.06134969325153374
0.06134969325153374 x 100 = 6.13%