Answer:
[tex]1\frac{1}{10}[/tex]
Step-by-step explanation:
Given
Dan grew [tex]\frac{3}{10}[/tex] of an inch, when he was 15.
Dan grew [tex]\frac{8}{10}[/tex] of an inch, when he was 16.
Dan grow during these two years by adding growth of year 15 and 16
Such as
[tex]growth=\frac{3}{10}+\frac{8}{10}[/tex]
[tex]growth=\frac{3+8}{10} \\growth=11/10[/tex]
And also we write the answer in whole or mixed number such as
=[tex]1\frac{1}{10}[/tex]