first way: To transform into an improper fraction just follow a practical process:
Repeat the denominator and multiply its value with the integer part and sum with the numerator.
[tex]1 \frac{3}{5} = \frac{5*1+3}{5} = \frac{5+3}{5} = \boxed{\boxed{\frac{8}{5}}} \end{array}}\qquad\quad\checkmark[/tex]
second way: Let's sum the whole part with the fractional part and then do the least common multiple, then solve and find the solution.
[tex]1 + \frac{3}{5} = \frac{5}{5} + \frac{3}{5} = \boxed{\boxed{\frac{8}{5} }}\end{array}}\qquad\quad\checkmark[/tex]