23% is the change from 639 to 786
Calculation steps:
[( 786 - 639 ) ÷ 639] x 100 = 23%
Formula
Percentage change = [(786 - 639) / 639] x 100
Subtract the new number by the original number
786 - 639 = 147
147 ÷ 639 = 0.2300469483568075
0.2300469483568075 x 100 = 23%