Final answer:
To create equivalent fractions with common denominators for 3/5 and 5/7, find the LCM and multiply both numerator and denominator appropriately.
Step-by-step explanation:
To create equivalent fractions with common denominators for 3/5 and 5/7, we need to find the least common multiple (LCM) of 5 and 7, which is 35. Then, we can multiply both the numerator and denominator of each fraction by the appropriate factor to get the equivalent fractions.
For 3/5, we multiply by 7/7 to get 21/35.
For 5/7, we multiply by 5/5 to get 25/35.
So, the equivalent fractions with common denominators are 21/35 and 25/35.