from 119 to 68, that's be 119 - 68 = 51, so the increase is 51 bucks.
if we take 68 to be the 100%, what is 51 off of it in percentage?
[tex]\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 68&100\\ 51&x \end{array}\implies \cfrac{68}{51}=\cfrac{100}{x}\implies x=\cfrac{51\cdot 100}{68}\implies x=75[/tex]
