21.74% is the change from 529 to 644
Calculation steps:
[( 644 - 529 ) ÷ 529] x 100 = 21.74%
Formula
Percentage change = [(644 - 529) / 529] x 100
Subtract the new number by the original number
644 - 529 = 115
115 ÷ 529 = 0.21739130434782608
0.21739130434782608 x 100 = 21.74%