Question 1202919
<br>
Let x = length of blue paper
Then 2x = length of red paper<br>
number of pieces of blue paper: x/9
number of pieces of red paper: 2x/7<br>
number of stars: 3(x/9) = x/3
number of hearts: 5(2x/7) = 10x/7<br>
The fraction of shapes that were stars is the number of stars, divided by the total number of shapes:<br>
{{{(x/3)/((x/3)+(10x/7))}}}<br>
Multiply numerator and denominator by 3*7 = 21:<br>
{{{(7x)/(7x+30x)=(7x)/(37x)=7/37}}}<br>
ANSWER: 7/37<br>