55.21% is the change from 643 to 998
Calculation steps:
[( 998 - 643 ) ÷ 643] x 100 = 55.21%
Formula
Percentage change = [(998 - 643) / 643] x 100
Subtract the new number by the original number
998 - 643 = 355
355 ÷ 643 = 0.552099533437014
0.552099533437014 x 100 = 55.21%