The reciprocal of a number x is 1/x
The reciprocal of 5 is 1/5
The reciprocal of 6/11 is 1/6/11 = 11/6
we know that having similar triangles so the ratio of sides,area and volume are same.

we know that
will be the area of triangle.

so 
so the ratio of the perimeter of two triangles will be

ratio of the perimeter=
Answer:
you have 9 yes and 3 no. so 3/9=1/3=.333
You made 3/20 of the 400 cards, which is 60 cards.