17.88% is the change from 660 to 778
Calculation steps:
[( 778 - 660 ) ÷ 660] x 100 = 17.88%
Formula
Percentage change = [(778 - 660) / 660] x 100
Subtract the new number by the original number
778 - 660 = 118
118 ÷ 660 = 0.1787878787878788
0.1787878787878788 x 100 = 17.88%