What is the reciprocal method

What is the reciprocal method

When two numbers or polynomials with the same sign cannot be directly compared
Or when direct comparison is very troublesome, take the reciprocal comparison of two numbers
The original number with the largest reciprocal is smaller (note that the sign must be the same)
If you go to primary school, you don't have to worry about the signs
Direct, like four-thirds and five-quarters
The reciprocal is three quarters and four fifths respectively
Because three quarters, five quarters
If you go to high school, take a look here