23.35% is the change from 668 to 824
Calculation steps:
[( 824 - 668 ) ÷ 668] x 100 = 23.35%
Formula
Percentage change = [(824 - 668) / 668] x 100
Subtract the new number by the original number
824 - 668 = 156
156 ÷ 668 = 0.23353293413173654
0.23353293413173654 x 100 = 23.35%