1/3 of the fish in liam's fish tank were added today. half of the other fish were a gift to liam last week. the other 9 came from liam's old fish tank. how many fish are in the fish tank?

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5