55.05% is the change from 643 to 997
Calculation steps:
[( 997 - 643 ) ÷ 643] x 100 = 55.05%
Formula
Percentage change = [(997 - 643) / 643] x 100
Subtract the new number by the original number
997 - 643 = 354
354 ÷ 643 = 0.5505443234836703
0.5505443234836703 x 100 = 55.05%