24.03% is the change from 670 to 831
Calculation steps:
[( 831 - 670 ) ÷ 670] x 100 = 24.03%
Formula
Percentage change = [(831 - 670) / 670] x 100
Subtract the new number by the original number
831 - 670 = 161
161 ÷ 670 = 0.24029850746268658
0.24029850746268658 x 100 = 24.03%