19.31% is the change from 642 to 766
Calculation steps:
[( 766 - 642 ) ÷ 642] x 100 = 19.31%
Formula
Percentage change = [(766 - 642) / 642] x 100
Subtract the new number by the original number
766 - 642 = 124
124 ÷ 642 = 0.19314641744548286
0.19314641744548286 x 100 = 19.31%