not just any fraction can be written as a mixed number because, for example, 5/7 you can't because if you divide 7 into 5 you get some decimal and a decimal can't be the numerator or denominator of a fraction.
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Yes normally because any number that can be expressed as a fraction is rational
To convert an improper fraction to a mixed number, divide the denominator into the numerator. The answer is the whole number. Put any remainder over the original denominator to create the fraction part.
-- Any number that you can completely write down using digits, and a decimal point or fraction bar if needed, is rational. -- A rational number is defined as one that can be written as a fraction using whole numbers. -19 can be written as the fraction -19/1 .
Any number that can be written as a fraction is rational -- therefore, 4/9 squared is rational (it can still be written as a fraction even if you multiply it by itself).
Because it can't be written as any fraction with whole numbers on both the top and bottom.