2.85% is the change from 807 to 830
Calculation steps:
[( 830 - 807 ) ÷ 807] x 100 = 2.85%
Formula
Percentage change = [(830 - 807) / 807] x 100
Subtract the new number by the original number
830 - 807 = 23
23 ÷ 807 = 0.028500619578686492
0.028500619578686492 x 100 = 2.85%