37.5% is the change from 664 to 913
Calculation steps:
[( 913 - 664 ) ÷ 664] x 100 = 37.5%
Formula
Percentage change = [(913 - 664) / 664] x 100
Subtract the new number by the original number
913 - 664 = 249
249 ÷ 664 = 0.375
0.375 x 100 = 37.5%
Example