Final answer:
To change a mixed fraction to an improper fraction, multiply the whole number by the denominator and add it to the numerator. Keep the same denominator and the resulting numerator becomes the new numerator of the improper fraction.
Step-by-step explanation:
To convert a mixed fraction to an improper fraction, multiply the whole number by the denominator of the fraction and add it to the numerator.
Keep the same denominator.
The resulting numerator becomes the new numerator of the improper fraction.
Using the example 2¾, we can follow these steps:
Multiply 2 (the whole number) by 4 (the denominator of the fraction) and add it to 3 (the numerator): 2 * 4 + 3 = 11.
Keep the denominator the same: 4.
The improper fraction is 11/4.