Keep the denominators the same and subtract the numerators. So for example in your example: 
7/8 - 3/8 
Leave the 8 alone. Subtract 3 from 7. 
7 - 3 = 4 
So answer is: 
4/8 
Sometimes they may have to simplify the answer, and in this case, 4/8 could be simplified to 1/2 
 
        
                    
             
        
        
        
Answer:
a
Step-by-step explanation:
v=pixrsqaurexh
2411.52=pix8squarexh
2411.52=64pixh
2411.54/64pi=h
11.99=12
 
        
             
        
        
        
Answer:
Zero is the outlier.
Step-by-step explanation:
the rest of the numbers are all two-digit numbers while zero is one digit and farther away on a number line.
hope i helped!
 
        
             
        
        
        
The ratio of red to green is 5:6 which means that for every 5 red cars, there are 6 green cars
The ratio of green to blue is 3:10 telling us that for every 3 green cars, there are 10 blue cars. 
The ratio 3:10 is equivalent to 6:20 after we multiply both parts by 2. This now says that for every 6 green cars, there are 20 blue cars.
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Let's say we had 5 red cars, 6 green cars and 20 blue cars
Based on that info, we know that the ratio of red to green is 5:6
And the ratio of green to blue is 6:20 which reduces to 3:10
We don't reduce 6:20 to 3:10 however, since that would change the green count from 6 to 3. We want to keep the green count at 6.
So because there are 5 red cars, 6 green cars, and 20 blue cars in this example, and this example points to the proper ratios mentioned earlier, this means that the final answer is 5:6:20. This ratio cannot be reduced or simplified as there are no common factors (other than 1) for 5, 6, and 20.
        
             
        
        
        
Answer:
He has 5 sandwiches, 7 sides, and 10 drinks to choose from
Step-by-step explanation: