48.2% is the change from 639 to 947
Calculation steps:
[( 947 - 639 ) ÷ 639] x 100 = 48.2%
Formula
Percentage change = [(947 - 639) / 639] x 100
Subtract the new number by the original number
947 - 639 = 308
308 ÷ 639 = 0.48200312989045385
0.48200312989045385 x 100 = 48.2%