To multiply a fraction by a whole number, you first multiply the whole number by the numerator, then divide it by the denominator. In this case, we have 15, and need to multiply it by the numerator 7. 15x7 = 105. The next step is to divide this by the denominator 9. 105/9 = 11.666...
When writing it down, you would simply put 7/9 x 15 = 11.666...
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Seven ninths minus four ninths is 1/3.
5/9 x 27 = 15
7/9 > 11/15
seven and seven ninths.....or...... seventy ninths
12 is four ninths of twenty-seven.