36.9% is the change from 664 to 909
Calculation steps:
[( 909 - 664 ) ÷ 664] x 100 = 36.9%
Formula
Percentage change = [(909 - 664) / 664] x 100
Subtract the new number by the original number
909 - 664 = 245
245 ÷ 664 = 0.3689759036144578
0.3689759036144578 x 100 = 36.9%