29.81% is the change from 671 to 871
Calculation steps:
[( 871 - 671 ) ÷ 671] x 100 = 29.81%
Formula
Percentage change = [(871 - 671) / 671] x 100
Subtract the new number by the original number
871 - 671 = 200
200 ÷ 671 = 0.29806259314456035
0.29806259314456035 x 100 = 29.81%