math
posted by leah .
what is 7 16th plus 3 8th
please help me i am hopeless

You're not hopeless! You've asked a good question! :)
When you add fractions, they both must have the same denominator. In this problem, that denominator is 16, because 16 can be divided evenly by 8.
16/8 = 2
2 * 3 = 6
3/8 = 6/16
7/16 + 6/16 = 13/16