25.2% is the change from 639 to 800
Calculation steps:
[( 800 - 639 ) ÷ 639] x 100 = 25.2%
Formula
Percentage change = [(800 - 639) / 639] x 100
Subtract the new number by the original number
800 - 639 = 161
161 ÷ 639 = 0.2519561815336463
0.2519561815336463 x 100 = 25.2%