To change a mixed number like 1 1/3 (one and two-third) to an improper fraction, follow these steps:

First, multiply the whole number (the 1) by the denominator of the fraction (the 3 in 1/3). Then add this number to the numerator (the 1 in 1/3). You end up with 4.

Second, take the denominator from the fraction 1/3. This becomes the denominator for the improper fraction.

The resulting improper fraction is 4/3.

Note that the mixed number 1 1/3 is equal to the improper fraction 4/3.

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