48.83% is the change from 639 to 951
Calculation steps:
[( 951 - 639 ) ÷ 639] x 100 = 48.83%
Formula
Percentage change = [(951 - 639) / 639] x 100
Subtract the new number by the original number
951 - 639 = 312
312 ÷ 639 = 0.48826291079812206
0.48826291079812206 x 100 = 48.83%