Given:
Weight limit on one box = 28 kilograms
Weight of each box = ⅖ kilogram
To find the greatest number of boxes of pasta she can put into one cardboard box without exceeding the weight limit, we have:
[tex]G=28\div\frac{2}{5}[/tex]To divide the fraction, change the division sign to multiplication and flip the fraction:
[tex]\begin{gathered} =28\times\frac{5}{2} \\ \\ =\frac{28\times5}{2} \\ \\ =\frac{140}{2} \\ \\ =70 \end{gathered}[/tex]Therefore, the greatest number of boxes Evelyn can put without going over the weight limit is 70 boxes.
ANSWER:
70