Question 878066
A guess is that one square has 9 inch side and other square has 21 inch side.


"Primer" is meaningless.  We do not have such a term.  There is "prime" but this is not related to squares or rectangles.




The small square is 9*9 square inches for area.
_________________________________________81 square inches.



The bigger square is 21*21 square inches.
_________________________________________441 square inches.



Ratio of the bigger square area to the smaller square area:
{{{441/81}}}
{{{(3*7*3*7)/(3*3*3*3)}}}
{{{(7*7)/(3*3)}}}
{{{hightlight(49/9)}}}----ratio of areas, big to small squares