55.37% is the change from 643 to 999
Calculation steps:
[( 999 - 643 ) ÷ 643] x 100 = 55.37%
Formula
Percentage change = [(999 - 643) / 643] x 100
Subtract the new number by the original number
999 - 643 = 356
356 ÷ 643 = 0.5536547433903577
0.5536547433903577 x 100 = 55.37%