50.16% is the change from 638 to 958
Calculation steps:
[( 958 - 638 ) ÷ 638] x 100 = 50.16%
Formula
Percentage change = [(958 - 638) / 638] x 100
Subtract the new number by the original number
958 - 638 = 320
320 ÷ 638 = 0.5015673981191222
0.5015673981191222 x 100 = 50.16%