To reduce a fraction, you divide numerator and denominator by the same number. For this to be possible, the denominators must have a common factor larger than 1.
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That is not true.
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Any fraction composed of real numbers can be written as a decimal approximation.However, some irrational numbers, like Pi, are never-ending as decimals, and must be rounded off.
The 'answer' is the number that 'x' must be in order to make the statement true. If 'x' is anything different from -7, then the statement "x = -7" is not true. So the 'answer' must be -7 .
Say: "This fraction here is equal to that fraction there." If it's true, then that statement is a proportion.