0.25% is the change from 813 to 815
Calculation steps:
[( 815 - 813 ) ÷ 813] x 100 = 0.25%
Formula
Percentage change = [(815 - 813) / 813] x 100
Subtract the new number by the original number
815 - 813 = 2
2 ÷ 813 = 0.0024600246002460025
0.0024600246002460025 x 100 = 0.25%