28.73% is the change from 637 to 820
Calculation steps:
[( 820 - 637 ) ÷ 637] x 100 = 28.73%
Formula
Percentage change = [(820 - 637) / 637] x 100
Subtract the new number by the original number
820 - 637 = 183
183 ÷ 637 = 0.28728414442700156
0.28728414442700156 x 100 = 28.73%