Answer:
Ruben ate 6 pieces out of 8.
Step-by-step explanation:
We will understand 3/4 first. If we divide a pie into 4 pieces then Ruben ate 3 pieces of pie.
Further If we divide these 4 and 3 pieces to 8 and 6 then Ruben will eat 6 pieces out of 8.
Now we will show this mathematically
[tex]\frac{3}{4}=\frac{3}{4}\times \frac{2}{2}=\frac{3\times2}{4\times2}=\frac{6}{8}[/tex]
Ruben ate 6 pieces out of 8.