Answer:
To expand the fractions 1/3 and 1/5 so they have the same denominator, you can find the least common multiple (LCM) of 3 and 5, which is 15. Then, you can multiply both the numerator and denominator of each fraction by the same number to get equivalent fractions with a denominator of 15. So, 1/3 can be expanded to (15)/(35) = 5/15, and 1/5 can be expanded to (13)/(53) = 3/15.
Explanation: