35.84% is the change from 639 to 868
Calculation steps:
[( 868 - 639 ) ÷ 639] x 100 = 35.84%
Formula
Percentage change = [(868 - 639) / 639] x 100
Subtract the new number by the original number
868 - 639 = 229
229 ÷ 639 = 0.35837245696400627
0.35837245696400627 x 100 = 35.84%