27.95% is the change from 644 to 824
Calculation steps:
[( 824 - 644 ) ÷ 644] x 100 = 27.95%
Formula
Percentage change = [(824 - 644) / 644] x 100
Subtract the new number by the original number
824 - 644 = 180
180 ÷ 644 = 0.2795031055900621
0.2795031055900621 x 100 = 27.95%