22.69% is the change from 639 to 784
Calculation steps:
[( 784 - 639 ) ÷ 639] x 100 = 22.69%
Formula
Percentage change = [(784 - 639) / 639] x 100
Subtract the new number by the original number
784 - 639 = 145
145 ÷ 639 = 0.2269170579029734
0.2269170579029734 x 100 = 22.69%