49.65% is the change from 431 to 645
Calculation steps:
[( 645 - 431 ) ÷ 431] x 100 = 49.65%
Formula
Percentage change = [(645 - 431) / 431] x 100
Subtract the new number by the original number
645 - 431 = 214
214 ÷ 431 = 0.4965197215777262
0.4965197215777262 x 100 = 49.65%