40.91% is the change from 660 to 930
Calculation steps:
[( 930 - 660 ) ÷ 660] x 100 = 40.91%
Formula
Percentage change = [(930 - 660) / 660] x 100
Subtract the new number by the original number
930 - 660 = 270
270 ÷ 660 = 0.4090909090909091
0.4090909090909091 x 100 = 40.91%