If you have a dollar, you can always cash it in for four quarters  it is an even exchange. This can be represented mathematically as $1\,=\,\frac{4}{4}$.
Similarly, if you have 3 dollars, you can cash in one of those dollars for four quarters, leaving you with two dollars and four quarters  the same amount of money as \$3. This can be represented mathematically as $3\,=\,2\frac{4}{4}$.
We are going to use this idea of exchanging a whole number for an equivalent amount of fractions to learn how to subtract fractions from a whole number.
Example 1: $4\,\,1\frac{2}{5}\,=$
Step 1: Model the first number 
Step 2: Regroup the first number 
Step 3: Subtract 
Example 2: $6\,\,4\frac{5}{8}\,=$
Step 1: Model the first number 
Step 2: Regroup the first number 
Step 3: Subtract 
For more practice with fractions, please try this Fraction Calculator.
Question 1 $9\,\,2\frac{1}{5}\,=$

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Question 2 $4\,\,1\frac{3}{8}\,=$

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Question 3 $12\,\,7\frac{2}{7}\,=$

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