When you're multiplying fractions by an integer (or a whole number) you multiply the numerator of the fraction by the whole number, whilst the denominator of the fraction stays the same. Think about ...

“Who would draw a picture to divide 2/3 by 3/4?” asked Marina Ratner, a professor emerita of mathematics at the University of California at Berkeley, in a recent Wall Street Journal opinion piece.

Dividing by a fraction tells us how many smaller parts make up a whole number or another fraction. Bar models can help visualise the process of dividing by a fraction. We can also use the 'invert and ...