31.48% is the change from 664 to 873
Calculation steps:
[( 873 - 664 ) ÷ 664] x 100 = 31.48%
Formula
Percentage change = [(873 - 664) / 664] x 100
Subtract the new number by the original number
873 - 664 = 209
209 ÷ 664 = 0.3147590361445783
0.3147590361445783 x 100 = 31.48%