Answer:
Step-by-step explanation:
2.5 = 5 * .5
1 = 1
70 = 2 * 5 *  7
LCM = 2 * 5 * 7 
If you include the 1/2, you will reduce the LCM to 35, but 70 will be left out of the LCM.
 
        
             
        
        
        
Marco does 70 extra math problems each week. 14(5)=70 
        
                    
             
        
        
        
Answer:
75% bigger
Step-by-step explanation:
Let the first number be x and the second be y.
So:

And:
 -----30% less than x
 -----30% less than x
Substitute  in
 in 




Cross multiply


Collect like terms


Make x the subject


So, the average is:




Rewrite as:

Express as percentage

This means that the average is 75% bigger than the second number
 
        
             
        
        
        
Answer:
100.
Step-by-step explanation:
By proportion the number of apples sold  is (6/4) * 40
= 6 *10
= 60.
Total fruit = 40 + 60 = 100.