## Answer :

First, note that 1 can be written as the fraction [tex]\( \frac{10}{10} \)[/tex], which makes the subtraction easier to manage:

[tex]\[ 1 = \frac{10}{10} \][/tex]

Now, we perform the subtraction of the fractions:

[tex]\[ \frac{10}{10} - \frac{3}{10} = \frac{10 - 3}{10} = \frac{7}{10} \][/tex]

So,

[tex]\[ 1 - \frac{3}{10} = \frac{7}{10} \][/tex]

Therefore, the fraction to make the calculation correct is [tex]\( \frac{7}{10} \)[/tex].