What I always do to solve this, is find a common factor for each number first.
Usually 4 or 5 works best. I'll use 4. 
4 goes into 80 20 times, which means that 4 = 5%  of 80.
If 4 = 5%, and 48 = 12 x 4,    then 48 must equal 60% of 80.
(Another way to solve this problem is:  simplify 48 / 80.  This simplifies to 3/5.
3/5 = 60%)!
 
        
             
        
        
        
Answer:
20 square units
Step-by-step explanation:
You count how many across the parallelogram is (which is 4) and you count how high it is (which is 5). Then you multiply 5×4* which equals 20 square units. 
*The reason you do this is because base×hieght=area
 
        
                    
             
        
        
        
X = 2y
2x + 2y = 24
So if x = 2y that means 2x = 4y. Which means that 2x + 2y = 24 can be written as 4y + 2y = 24. Simplified to 6y = 24. Now we need to get 1y so we divide both sides by 6, 6y/6 = y and 24/6 = 4. so y = 4. so x= 2y can be written as x = 8.
        
             
        
        
        
Answer:
62.4 cm³
Step-by-step explanation:
Hope this helps :)
 
        
             
        
        
        
Answer:
20 por ciento de probabilidad de que elijas una de esas cartas
Step-by-step explanation:
20 por ciento de probabilidad de que elijas una de esas cartas