so Abby hasn't received 60% of her order, BUT she already got 80 lobsters, hmmmmm well, 100% - 60% is just 40%, so she already got the 40%, which incidentally is 80 lobsters. Let's say the whole order, or 100% of it is "x" lobsters.
if 80 lobsters are 40%, what is "x"?
[tex]\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
x&100\\
80&40
\end{array}\implies \cfrac{x}{80}=\cfrac{100}{40}\implies x=\cfrac{80\cdot 100}{40}[/tex]
