27.64% is the change from 644 to 822
Calculation steps:
[( 822 - 644 ) ÷ 644] x 100 = 27.64%
Formula
Percentage change = [(822 - 644) / 644] x 100
Subtract the new number by the original number
822 - 644 = 178
178 ÷ 644 = 0.27639751552795033
0.27639751552795033 x 100 = 27.64%