23% is the change from 661 to 813
Calculation steps:
[( 813 - 661 ) ÷ 661] x 100 = 23%
Formula
Percentage change = [(813 - 661) / 661] x 100
Subtract the new number by the original number
813 - 661 = 152
152 ÷ 661 = 0.22995461422087746
0.22995461422087746 x 100 = 23%