47.89% is the change from 639 to 945
Calculation steps:
[( 945 - 639 ) ÷ 639] x 100 = 47.89%
Formula
Percentage change = [(945 - 639) / 639] x 100
Subtract the new number by the original number
945 - 639 = 306
306 ÷ 639 = 0.4788732394366197
0.4788732394366197 x 100 = 47.89%