Here are some fractions that are equivalent to 2 over negative 3:
positive 2 over negative 3 negative 2 over positive 3 positive 2 over positive 3 negative 2 over negative 3 positive 4 over negative 6 negative 4 over positive 6 positive 4 over positive 6 negative 4 over negative 6 positive 6 over negative 9 negative 6 over positive 9 positive 6 over positive 9 negative 6 over negative 9 positive 8 over negative 12 negative 8 over positive 12 positive 8 over positive 12 negative 8 over negative 12 positive 10 over negative 15 negative 10 over positive 15 positive 10 over positive 15 negative 10 over negative 15 positive 12 over negative 18 negative 12 over positive 18 positive 12 over positive 18 negative 12 over negative 18 positive 14 over negative 21 negative 14 over positive 21 positive 14 over positive 21 negative 14 over negative 21 positive 16 over negative 24 negative 16 over positive 24 positive 16 over positive 24 negative 16 over negative 24 positive 18 over negative 27 negative 18 over positive 27 positive 18 over positive 27 negative 18 over negative 27 positive 20 over negative 30 negative 20 over positive 30 positive 20 over positive 30 negative 20 over negative 30 positive 22 over negative 33 negative 22 over positive 33 positive 22 over positive 33 negative 22 over negative 33 positive 24 over negative 36 negative 24 over positive 36 positive 24 over positive 36 negative 24 over negative 36 positive 26 over negative 39 negative 26 over positive 39 positive 26 over positive 39 negative 26 over negative 39 positive 28 over negative 42 negative 28 over positive 42 positive 28 over positive 42 negative 28 over negative 42 positive 30 over negative 45 negative 30 over positive 45 positive 30 over positive 45 negative 30 over negative 45 positive 32 over negative 48 negative 32 over positive 48 positive 32 over positive 48 negative 32 over negative 48 positive 34 over negative 51 negative 34 over positive 51 positive 34 over positive 51 negative 34 over negative 51 positive 36 over negative 54 negative 36 over positive 54 positive 36 over positive 54 negative 36 over negative 54 positive 38 over negative 57 negative 38 over positive 57 positive 38 over positive 57 negative 38 over negative 57 positive 40 over negative 60 negative 40 over positive 60 positive 40 over positive 60 negative 40 over negative 60 positive 42 over negative 63 negative 42 over positive 63 positive 42 over positive 63 negative 42 over negative 63 positive 44 over negative 66 negative 44 over positive 66 positive 44 over positive 66 negative 44 over negative 66 positive 46 over negative 69 negative 46 over positive 69 positive 46 over positive 69 negative 46 over negative 69 positive 48 over negative 72 negative 48 over positive 72 positive 48 over positive 72 negative 48 over negative 72 positive 50 over negative 75 negative 50 over positive 75 positive 50 over positive 75 negative 50 over negative 75
If you let the width be x, then the length will be 2x + 3. The perimeter P is
twice the width plus twice the length, i.e.,
P = 2*x + 2*(2x + 3) = 2x + 4x + 6 = 6x + 6.
So if the perimeter is 66 cm then 66 = 6x + 6 ---> 6x = 60 ---> x = 10 cm.,
and so if the perimeter is at most 66 cm., the width can be at most 10 cm..
