Multiple choice If a and b are positive integers and (a-b)/3.5 = 4/7, then b < a b > a b = a b > = a Reveal answer Fill a bubble to check yourself A Correct answer Explanation Given (a-b)/3.5 = 4/7 and a, b are positive integers. Cross-multiply: 7(a-b) = 4 × 3.5 = 14, so a - b = 2. Since a - b = 2 > 0, we have a > b, which means b < a. Option A is correct.