30.71% is the change from 661 to 864
Calculation steps:
[( 864 - 661 ) ÷ 661] x 100 = 30.71%
Formula
Percentage change = [(864 - 661) / 661] x 100
Subtract the new number by the original number
864 - 661 = 203
203 ÷ 661 = 0.3071104387291982
0.3071104387291982 x 100 = 30.71%