56.18% is the change from 639 to 998
Calculation steps:
[( 998 - 639 ) ÷ 639] x 100 = 56.18%
Formula
Percentage change = [(998 - 639) / 639] x 100
Subtract the new number by the original number
998 - 639 = 359
359 ÷ 639 = 0.5618153364632238
0.5618153364632238 x 100 = 56.18%