how do you get your solution for greater than less than interger fractions

Question

-49/57 -13/80

 

What is the answer to this problem? When comparing less than or greater or equal to?

Answer 1

-49/57 ?? -13/80

 

You need the same denominator.

 

57 = 3 * 19

 

80 = 2^4 * 5

 

No commonality, so brute force:

 

-49*80/(57*80) ?? -13*57/(57*80)

 

-49*80 ?? -13*57

 

-(50-1)(100-20) ?? -(10+3)(60-3)

 

-(5000-1000 - 100+20) ?? -(600-30 + 180-9)

 

-(3920) < -(741)