To find seven fifteenths of 3 as an improper fraction, we can multiply 3 by the fraction 7/15.
To do this, we multiply the numerators (7 * 3 = 21) and the denominators (15) together. This gives us the fraction 21/15.
However, since 21 and 15 have a common factor of 3, we can simplify the fraction by dividing both the numerator and denominator by 3.
Dividing 21 by 3 gives us 7, and dividing 15 by 3 gives us 5. Therefore, the simplified improper fraction is 7/5.
So, seven fifteenths of 3 as an improper fraction is 7/5.