28 - 3/ 10

To solve the expression \( 28 - \frac{3}{10} \), you can first convert 28 to a fraction with a denominator of 10:

\[ 28 = \frac{280}{10} \]

Now, subtract \(\frac{3}{10}\) from \(\frac{280}{10}\):

\[ \frac{280}{10} - \frac{3}{10} = \frac{280 - 3}{10} = \frac{277}{10} \]

So, \( 28 - \frac{3}{10} = \frac{277}{10} \) or \( 27.7 \).