So she used [tex] \frac{5}{6} [/tex] of the cord to make necklaces.
[tex]1- \frac{5}{6} = \frac{1}{6} [/tex]
She splits the [tex] \frac{1}{6} [/tex] length into 4 equal lengths.
To divide a fraction by a fraction, you multiply it by its reciprocal.
[tex] \frac{1}{6} ( \frac{1}{4}) [/tex]
[tex] =\frac{1}{24} [/tex]
She used [tex] \frac{1}{24} [/tex] of the original chord to make each bracelet.