29.34% is the change from 634 to 820
Calculation steps:
[( 820 - 634 ) ÷ 634] x 100 = 29.34%
Formula
Percentage change = [(820 - 634) / 634] x 100
Subtract the new number by the original number
820 - 634 = 186
186 ÷ 634 = 0.29337539432176657
0.29337539432176657 x 100 = 29.34%