30.7% is the change from 671 to 877
Calculation steps:
[( 877 - 671 ) ÷ 671] x 100 = 30.7%
Formula
Percentage change = [(877 - 671) / 671] x 100
Subtract the new number by the original number
877 - 671 = 206
206 ÷ 671 = 0.30700447093889716
0.30700447093889716 x 100 = 30.7%