I need help, my teacher didn't really explain it well. Help the best you can :)

[16] 1/4’s are in 4.
[5] 1/3’s are in 1 2/3
[3] 1/5’s are in 3/5.

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?