34.83% is the change from 646 to 871
Calculation steps:
[( 871 - 646 ) ÷ 646] x 100 = 34.83%
Formula
Percentage change = [(871 - 646) / 646] x 100
Subtract the new number by the original number
871 - 646 = 225
225 ÷ 646 = 0.34829721362229105
0.34829721362229105 x 100 = 34.83%