31% is the change from 671 to 879
Calculation steps:
[( 879 - 671 ) ÷ 671] x 100 = 31%
Formula
Percentage change = [(879 - 671) / 671] x 100
Subtract the new number by the original number
879 - 671 = 208
208 ÷ 671 = 0.30998509687034276
0.30998509687034276 x 100 = 31%