Aliquot parts refers to an exact divisor of a number, although when we were required to memorize the aliquot parts, as I recall, back in upper elementary and junior high grades, they were not all exact. For example 1/3 and 2/3 never "came out even." What we memorized were the fractional and decimal parts of a 100-- such as the common ones of 1/2, 1/4, 3/4, etc. but also we were required to memorize 1/3, 1/5, 1/6, 1/7, 1/8, 1/9, 1/11, 1/13, etc. up to 1/19 and then be able to know their doubles and triples as well. Then were were able to give the decimal equivalents. 1/3 was 33 1/3, or 1/3 of a hundred, thus we could convert easily to per cent, knowing 1/3 was 33 1/3 % therefore. For example I knew that 1/8 was 12 1/2, 2/8 (being 1/4th) was 25, 3/8 was 37 1/2, 5/8 was 62 1/2, etc . etc. and all those were the same as per cents. We memorized those to make our math go easier---no hand-held calculators back in those days! I graduated from high school in 1955. Ann