A car run 3/4 mile per minute another car can run 4/5 mile per minute. what is the difference in speed in miles per hour?

3 miles per hour

Step-by-step explanation:

We need to subtract the two numbers to find the difference in speeds

4/5 - 3/4

We need to get a common denominator of 20

4/5 * 4/4 - 3/4 * 5/5

16/20 - 15/20

1/20

The car going 4/5 miles per minute is going 1/20 miles per minute faster than the car going 3/4 miles per minute.

The question asks for miles per hour, not miles per minute. We know that there are 60 minutes per hour.

1/20 miles per minute * 60 minutes / hour

60/20 miles/hour

3 miles / hour

The car going 4/5 miles per minute is going 3 miles per hour faster than the car going 3/4 miles per minute.