With fabric 54" wide for every two yards you will get 4 of the runners. You are going to have fabric waste and will end up with enough for 16 runners but you have to buy 8 yards to get at the least your 13 runners because of the 72" length
You need at least 4 yards of fabric to make a 70 inch round table cloth. Most people would use close to 6 yards to make the designs that they'd like to.
90 by 156 will make how many yards of table cloth for a rectangular
You don't say what shape of table. However, for a table cloth you need to measure the length and width of the table plus 12" overhang on each side. For example, if your table is rectangular 72" long and 30" wide you'll need fabric 96" long and 54" wide minimum (plus you'll need to add a little extra to allow for hemming; maybe another inch per side). In the event your table is round, you'll need enough fabric for 98" x 98" (hem allowance included).
4/10 or 2/5.
That depends on what you want to make. Or do you mean how many yards of fabric are in 12 feet of fabric? If that's what you mean, the answer is 12 feet is equal to 4 yards.
5
How much fabric is needed to make a twin size bed skirt depends on the type of skirt that you want. You will need four yards of fabric for a tailored skirt. You will need six yards of fabric for a boxed pleated skirt, and you will need eight yards of fabric for a shirred skirt.
A yard is 3 feet 42 / 3 = 14 yards
I'll assume the designer did not purchase 1949 yards of fabric unless it's for Melania Trump. If that's 4 and 1/2, 6 and 2/3, and 9 and 1/4, that's 20 and 5/12 yards.
amount of vinegar needed to colorfast 10 yards of fabric
Mattel has used about 105 million yards of fabric to make Barbie fashions, making the toy company one of the largest apparel manufacturers in the world.
About 11-12 yards