Answer:
[tex]\frac{2}{3}[/tex]
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"Of" means to multiply, so start off the equation multiplying the top numbers by the top numbers, and the bottom numbers by the bottom numbers as though they are whole numbers.
[tex]\frac{3*8}{4*9} = \frac{24}{36}[/tex]
Find the greatest common factors of 24 and 36, starting with 24
24: 1, 2, 3, 4, 6, 8, 12, 24
36: 1, 2, 3, 4, 6, 9, 12, 18, 36
As shown, the greatest common factors are 12, so divide by 12 to simplify.
[tex]\frac{24 / 12}{36/12} = \frac{2}{3}[/tex]
Two-thirds cannot be simplified, so that will be your final answer.