The sales tax in odisha's state is 5%. Kadisha says she computes a 15% tip by multiplying the tax shown on her bill by 3. For a bill with a tax charge of $.38, kadisha tip is $.38 x 3 = $1.14. Why does kadushas methof work? Use a similar method to compare a 20% tip. Explain your reasoning. When people leave a 15% or 20% tip, they often round up to the nearest multiple of 5 or 10 cents. If Kardisha always round up, what is a 20% tip on her bill?