31.74% is the change from 668 to 880
Calculation steps:
[( 880 - 668 ) ÷ 668] x 100 = 31.74%
Formula
Percentage change = [(880 - 668) / 668] x 100
Subtract the new number by the original number
880 - 668 = 212
212 ÷ 668 = 0.31736526946107785
0.31736526946107785 x 100 = 31.74%