30.45% is the change from 660 to 861
Calculation steps:
[( 861 - 660 ) ÷ 660] x 100 = 30.45%
Formula
Percentage change = [(861 - 660) / 660] x 100
Subtract the new number by the original number
861 - 660 = 201
201 ÷ 660 = 0.30454545454545456
0.30454545454545456 x 100 = 30.45%