There is 8/9 and 6/7. Question: Which is larger and by how much?
Answer: 8/9 is larger by 2/63.
There is 8/21 and 17/50. Question: Which is larger and by how much?
Answer: 8/21 is larger by 43/1050.

Evaluating Fractions

We, Chunfeng and others, respectfully note: Fractions have different names and their principles are not uniform. Comparing the amount by which they exceed one another is therefore called "Evaluating Fractions."

The Rule states: Multiply the numerators by the opposing denominators, subtract the smaller from the larger, and the remainder is the dividend. Multiply the denominators...