a) 9/11 = 9×3/11×3 = 27/33
17/37 = 17×3/37×3 = 51/111
a/b = 3×a/3×b
(a+3)/(b+1) = 3(a+3)/3(b+1) = (3a+9)/(3b+3)
b) 9/11 = 9×9/9×11 = 81/99
17/37 = 9×17/9×37 = 153/333
a/b = 9a/9b
(a+3)/(b+1) = 9(a+3)/9(b+1) = (9a+27)/(9b+9)
c) 9/11 = 9X/11X
17/37 = 17X/37X
a/b = aX/bX
(a+3)/(b+1) = (aX+3X)/(bX+X)
d) 9/11 = 9×2a/11×2a = 18a/22a
17/37 = 17×2a/37×2a = 34a/74a
a/b = a×2a/b×2a = 2a^/2ab
(a+3)/(b+1) = 2a(a+3)/2a(b+1) =( 2a^+6a)/(2ab+2a)