25 - 14.99 = 10.01
10.01 divided by 2.75 = 3.64.
Sharon can get 3 skeins of yarn for her sister.
Since after the knitting machine, she is only
left with approximately $10 that leaves her able to get 3 skeins of yard with change left over. Since 3 skeins would cost 8.25, that would only leave Sharon with $1.75. Which would not be enough to buy another skein