49.88% is the change from 431 to 646
Calculation steps:
[( 646 - 431 ) ÷ 431] x 100 = 49.88%
Formula
Percentage change = [(646 - 431) / 431] x 100
Subtract the new number by the original number
646 - 431 = 215
215 ÷ 431 = 0.4988399071925754
0.4988399071925754 x 100 = 49.88%