The crossword solution for the term 'Part of Whole' is 'FRACTION'. A FRACTION is a mathematical expression that represents a part of a whole. It is written as a ratio of two numbers, with the numerator representing the number of parts and the denominator representing the total number of parts in the whole. Fractions are used to express parts of a whole, such as one-half or three-quarters. They can also be used to represent ratios, such as the ratio of two numbers.