Select the proper order from least to
greatest for 1/2, 5/6 2/7, 4/2
a.4/2, 5/6.1/2, 2/7
b. 2/7 ,1/2.5/6, 4/2
c.4/2 ,2/7, 5/6 1/2
d. 2/7, 5/6, 1/2, 4/2

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm

Maybe the answer is 20mm. all i really did was just multiply, which is obvious.