Question

please help on this one I am a bad student but good

Answer 1

We are given the following fractions:

$\frac{25}{30}-\frac{21}{30}$

To subtract fractions with the same denominator, in this case, 30, we leave the same denominator and operate the numerators, like this:

$\frac{25}{30}-\frac{21}{30}=\frac{25-21}{30}=\frac{4}{30}$

Now we simplify the fraction by dividing both parts by 2:

$\frac{4}{30}=\frac{\frac{4}{2}}{\frac{30}{2}}=\frac{2}{15}$