28.92% is the change from 664 to 856
Calculation steps:
[( 856 - 664 ) ÷ 664] x 100 = 28.92%
Formula
Percentage change = [(856 - 664) / 664] x 100
Subtract the new number by the original number
856 - 664 = 192
192 ÷ 664 = 0.2891566265060241
0.2891566265060241 x 100 = 28.92%