56.03% is the change from 639 to 997
Calculation steps:
[( 997 - 639 ) ÷ 639] x 100 = 56.03%
Formula
Percentage change = [(997 - 639) / 639] x 100
Subtract the new number by the original number
997 - 639 = 358
358 ÷ 639 = 0.5602503912363067
0.5602503912363067 x 100 = 56.03%