How to calculate rate? ?

To calculate rate, you need to divide the change in a quantity by the time it took for that change to occur. The formula for calculating rate is:

Rate = Change in Quantity / Time

For example, if a car travels 100 miles in 2 hours, the rate of speed would be:

Rate = 100 miles / 2 hours = 50 miles per hour

So, the car is traveling at a rate of 50 miles per hour.