1) Fractions like 1/3, 2/6, and 3/9 represent the same quantity because they are equivalent fractions of 1/3. 2) The fraction 1/3 is easier to visualize mentally than other equivalent fractions because it can be seen as 1 part out of 3 total parts. 3) To find the simplest form of a fraction, we find the highest common factor (HCF) of the numerator and denominator and divide both by the HCF.