Isabel got a prepaid debit card with $25 on it. For her first purchase with the card, she bought some bulk ribbon at a craft store. The price of the ribbon was 22 cents per yard. If after that purchase there was $21.92 left on the card, how many yards of ribbon did Isabel buy?
Let x be the number of yards of ribbon Isabel bought.
The total cost of the ribbon is 0.22x.
After the purchase, Isabel had $21.92 left on the card, so:
$25 - $21.92 = $0.22x
$3.08 = $0.22x
x = $3.08 / $0.22
x = 14
Isabel bought 14 yards of ribbon.