Bus route A arrives at its stop every 15 minutes. Bus route B arrives at its stop across the street every 40 minutes. If both buses are currently arriving at their stops, how many hours will pass before both buses arrive at the same time?

120 minutes

Step-by-step explanation:

15 x 8 = 120

40 x 3 = 120

3-4

step-by-step explanation:

the answer is 3-4 because both 45 and 60 has a multiple of 15.

45/3=15

60/4=15

therefore the odds against selecting a red is 4-3

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8