48.43% is the change from 638 to 947
Calculation steps:
[( 947 - 638 ) ÷ 638] x 100 = 48.43%
Formula
Percentage change = [(947 - 638) / 638] x 100
Subtract the new number by the original number
947 - 638 = 309
309 ÷ 638 = 0.4843260188087774
0.4843260188087774 x 100 = 48.43%