62.15% is the change from 391 to 634
Calculation steps:
[( 634 - 391 ) ÷ 391] x 100 = 62.15%
Formula
Percentage change = [(634 - 391) / 391] x 100
Subtract the new number by the original number
634 - 391 = 243
243 ÷ 391 = 0.6214833759590793
0.6214833759590793 x 100 = 62.15%