15 over 2
Divide by a fraciton mean multiplying by its reciprocal. (25/12) ÷ (5/18) = (25/12) × (18/5). Now, cancel BEFORE you multiply. Cancel a factor of 6 and factor of 5. (25/12) × (18/5) = (25/2) × (3/5) =(5/2) × (3/1) = 15/2. Leave the answer as an improper fraction: no need to change to a mixed numeral.