Answer:
22/35
Step-by-step explanation:
find the common denominator, which is 35.
multiply the numerator and the denominator of 3/7 by 5
- that would equal 15/35
multiply the numerator and the denominator of 1/5 by 7
- that would equal 7/35
now add 15/35 + 7/35 = 22/35
