Jennie makes quilts. She can make 7 quilts with 21 yards of material. How many yards of material would be required to make 12 quilts?
The amount of material that Jennie needs per quilts is 21 yards / 7 quilts = <<21/7=3>>3 yards per quilt.
In order to make 12 quilts, Jennie will need 12 quilts * 3 yards = <<12*3=36>>36 yards.
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