CHANCES:

 

That the coupon you have cannot be used for items on sale, like the item you want – 64%

That the coupon you have cannot be combined with another coupon you want to use – 86%

That the coupon you have expired yesterday - 16%

That the coupon you have is good only if you spend another $135 more than you want – 41%

That you can actually use the coupon – 2%