19.76% is the change from 668 to 800
Calculation steps:
[( 800 - 668 ) ÷ 668] x 100 = 19.76%
Formula
Percentage change = [(800 - 668) / 668] x 100
Subtract the new number by the original number
800 - 668 = 132
132 ÷ 668 = 0.19760479041916168
0.19760479041916168 x 100 = 19.76%