30.12% is the change from 664 to 864
Calculation steps:
[( 864 - 664 ) ÷ 664] x 100 = 30.12%
Formula
Percentage change = [(864 - 664) / 664] x 100
Subtract the new number by the original number
864 - 664 = 200
200 ÷ 664 = 0.30120481927710846
0.30120481927710846 x 100 = 30.12%