28.1% is the change from 637 to 816
Calculation steps:
[( 816 - 637 ) ÷ 637] x 100 = 28.1%
Formula
Percentage change = [(816 - 637) / 637] x 100
Subtract the new number by the original number
816 - 637 = 179
179 ÷ 637 = 0.28100470957613816
0.28100470957613816 x 100 = 28.1%