21.7% is the change from 636 to 774
Calculation steps:
[( 774 - 636 ) ÷ 636] x 100 = 21.7%
Formula
Percentage change = [(774 - 636) / 636] x 100
Subtract the new number by the original number
774 - 636 = 138
138 ÷ 636 = 0.2169811320754717
0.2169811320754717 x 100 = 21.7%