38.55% is the change from 664 to 920
Calculation steps:
[( 920 - 664 ) ÷ 664] x 100 = 38.55%
Formula
Percentage change = [(920 - 664) / 664] x 100
Subtract the new number by the original number
920 - 664 = 256
256 ÷ 664 = 0.3855421686746988
0.3855421686746988 x 100 = 38.55%