49.55% is the change from 664 to 993
Calculation steps:
[( 993 - 664 ) ÷ 664] x 100 = 49.55%
Formula
Percentage change = [(993 - 664) / 664] x 100
Subtract the new number by the original number
993 - 664 = 329
329 ÷ 664 = 0.4954819277108434
0.4954819277108434 x 100 = 49.55%