33.03% is the change from 660 to 878
Calculation steps:
[( 878 - 660 ) ÷ 660] x 100 = 33.03%
Formula
Percentage change = [(878 - 660) / 660] x 100
Subtract the new number by the original number
878 - 660 = 218
218 ÷ 660 = 0.3303030303030303
0.3303030303030303 x 100 = 33.03%