Rate = (150 miles)/(3 hrs) = 50 mph
so . . .
(50 mph)*(time) = 400 miles
*divide both sides by 50 mph
time = (400 miles)/(50 mph) = 8 hrs
time = 8 hrs
C. 5/14
You find the LCD. In this case it would be 14 since both 7 and 14 can go into 14. You have to multiply the top by the same number as the bottom. 2*7=14
2*3=6. You now have 6/14. 6-1=5
The denominator stays the same. 5/14
Whenever you have a repeating decimal, you can convert it into a fraction by taking the part that repeats and dividing it by the same amount of 9's.
Here, it's just the one 8 that keeps repeating.
So, the fraction would be 8/9