pake cara yaa no 30-33

30. (17/8-7/4) : (23/6-17/4)
=51/24 - 42/24 = 9/24
=92/24 - 102/24 = -10/24
=9/24 : -10/24 = 9/24 x -24/10 = 216/240 =
(-9/10)C
31. 4096/729 : -64/27
=4096/729 : -27/64= (-64/27)D
32. C
-2/5x-2/5x-2/5 = -8/125
33. 50/3 : 100/1 = 50/3 : 1/100 = 50/300 = (1/6)A