50.47% is the change from 428 to 644
Calculation steps:
[( 644 - 428 ) ÷ 428] x 100 = 50.47%
Formula
Percentage change = [(644 - 428) / 428] x 100
Subtract the new number by the original number
644 - 428 = 216
216 ÷ 428 = 0.5046728971962616
0.5046728971962616 x 100 = 50.47%