23.2% is the change from 668 to 823
Calculation steps:
[( 823 - 668 ) ÷ 668] x 100 = 23.2%
Formula
Percentage change = [(823 - 668) / 668] x 100
Subtract the new number by the original number
823 - 668 = 155
155 ÷ 668 = 0.23203592814371257
0.23203592814371257 x 100 = 23.2%