20.57% is the change from 637 to 768
Calculation steps:
[( 768 - 637 ) ÷ 637] x 100 = 20.57%
Formula
Percentage change = [(768 - 637) / 637] x 100
Subtract the new number by the original number
768 - 637 = 131
131 ÷ 637 = 0.20565149136577707
0.20565149136577707 x 100 = 20.57%