Final answer:
Sean used 12 tickets on food at the carnival, which is calculated by taking 2/5 of his total 30 tickets.
Step-by-step explanation:
Sean has 30 tickets to use at the carnival, and he uses 2/5 of them on food. To find out how many tickets he spent on food, we need to calculate 2/5 of 30.
Step 1: Convert the fraction to a decimal by dividing the numerator by the denominator. In this case, 2 ÷ 5 = 0.4.
Step 2: Multiply the total number of tickets by the decimal. So, 30 × 0.4 = 12.
Sean used 12 tickets on food at the carnival.