If you make the numbers into a ratio, it'll be easier to find the answer. There are 68 blue squares for the 4 green squares in the quilt. 68:4, or 68/4 If we do the division of the ratio, 68/4, we end up with 17. Now, we multiply that by the 11 green squares of the new quilt. 17x11=187 This shows that there will be 187 blue squares in the quilt with 11 green squares.
Remove the vine, it is causing the population to decrease. No amount of animals etc. will be able to take care of the vine if the population is already decreasing.