108.14% is the change from 307 to 639
Calculation steps:
[( 639 - 307 ) ÷ 307] x 100 = 108.14%
Formula
Percentage change = [(639 - 307) / 307] x 100
Subtract the new number by the original number
639 - 307 = 332
332 ÷ 307 = 1.0814332247557004
1.0814332247557004 x 100 = 108.14%