15.02% is the change from 666 to 766
Calculation steps:
[( 766 - 666 ) ÷ 666] x 100 = 15.02%
Formula
Percentage change = [(766 - 666) / 666] x 100
Subtract the new number by the original number
766 - 666 = 100
100 ÷ 666 = 0.15015015015015015
0.15015015015015015 x 100 = 15.02%