20.75% is the change from 636 to 768
Calculation steps:
[( 768 - 636 ) ÷ 636] x 100 = 20.75%
Formula
Percentage change = [(768 - 636) / 636] x 100
Subtract the new number by the original number
768 - 636 = 132
132 ÷ 636 = 0.20754716981132076
0.20754716981132076 x 100 = 20.75%