Answer:
Chance bought a surf board for 249. Now it's on sale for 221.10 and 11.20% is the discount.
Solution:
Step 1:
Bought price= RS.249
Sale price=RS.221.10
Step 2:
Discount = bought price - sales price
Discount = 249 - 221.10
Discount = 27.9
Step 3:
Discount Percent =

Substitute the value for Discount which we found in step 2 in the above formulae
Discount Percent =

On simplification, we get

Discount Percent = 11.20%
Result:
Hence from the given data, we got the discount percent is 11.20%