0.61% is the change from 815 to 820
Calculation steps:
[( 820 - 815 ) ÷ 815] x 100 = 0.61%
Formula
Percentage change = [(820 - 815) / 815] x 100
Subtract the new number by the original number
820 - 815 = 5
5 ÷ 815 = 0.006134969325153374
0.006134969325153374 x 100 = 0.61%