30:42 is represented as 30/42
The lowest form for that is 5/7. Hope that helped. Good luck
        
             
        
        
        
Total number of marbles:
75 + 50 + 100 + 25 =
 250
Probability of selecting a red marble:
25/250 (since 25 out of 250 marbles are red)
Since the top and bottom of this fraction are both divisible by 25, we can go ahead and divide them both by 25, simplifying to 
1/10.
Probability of selecting a green marble:
50/250
Simplifies to 2/10
Simplifies to 
1/5.
Probability of selecting a blue or orange marble
(75+100)/250
175/250
Simplifies to 
7/10.
To find the probability that each event occurs in order, simply multiply them all together.
 
 
        
        
        
-272 hope this helped you
        
             
        
        
        
Answer:
15/16-3/4 is 3/16. (1/8 simplified)
Step-by-step explanation: Let the 4 turn into a 16. Multiply 4 by 4 to get 16. Then, multiply the numerator by the number you multiplied for the denominator. 3x4 is 12. Now, can subtract. 15-12=3. 
 
        
                    
             
        
        
        
The difference between the 26 mile trip and 38 mile trip is 12 miles.
The difference in the price is $3.00   ($65.50 - $62.50)
So those 12 miles cost $3.00     $3.00÷12 = $.25 per mile
We can use either given trip to solve.  I will use the 38  mile trip.
The difference between 38 miles and 54 miles is 16 miles.   At $.25 a mile those 16 miles will add $4.00 to the price.  ($.25 x 16 = $4.00)
Since the 38 mile trip costs $65.50 we add $4.00 and get $69.50 for a 54 mile trip.