OG 11 Questions

Hey guys, I need help with following questions from OG 11 1. If r and s are positive numbers, r is what percentage of s? <Q8,OG11> a. r/s = ¾ b. r+s = 75/100 2. If m>0 and n>0 , is (m+x)/(n+x) > m/n <Q143,OG11> a. M<n b. X>0 3. Is 1/p > r/(r^2+1) ? <Q145,OG11> a. P=r b. R>0 4. If n is a positive int...