ANSWER
56.36%
Step-by-step explanation
The store posted a discounted price of $24.
The original price of the jeans is $55.
To calculate the percent decrease, we first have to subtract the new cost of the jeans from the original price of the jeans:
$55 - $24 = $31
Now, we divide this by the original price and multiply by 100:
There was a 56.36% decrease.