43.73% is the change from 638 to 917
Calculation steps:
[( 917 - 638 ) ÷ 638] x 100 = 43.73%
Formula
Percentage change = [(917 - 638) / 638] x 100
Subtract the new number by the original number
917 - 638 = 279
279 ÷ 638 = 0.4373040752351097
0.4373040752351097 x 100 = 43.73%