29.07% is the change from 664 to 857
Calculation steps:
[( 857 - 664 ) ÷ 664] x 100 = 29.07%
Formula
Percentage change = [(857 - 664) / 664] x 100
Subtract the new number by the original number
857 - 664 = 193
193 ÷ 664 = 0.29066265060240964
0.29066265060240964 x 100 = 29.07%