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how to calculate percentages - dummies

most of the time you will be given a percentage of a given number. for example you may know that 40 percent of your paycheck will go to taxes and you want to find out how much money that is. to calculate the percentage of a specific number you first convert the percentage number to a decimal. this process is the reverse of what you did earlier.

speed and velocity - math is fun

average vs instantaneous speed. the examples so far calculate average speed: how far something travels over a period of time. but speed can change as time goes by. a car can go faster and slower maybe even stop at lights. so there is also instantaneous speed: the speed at an instant in time. we can try to measure it by using a very short span

speed and velocity - math is fun

speed and velocity speed and velocity. speed is how fast something moves. velocity is speed with a direction.. saying ariel the dog runs at 9 km/h (kilometers per hour) is a speed.. but saying he runs 9 km/h westwards is a velocity.

how to calculate speed & distance sciencing

calculating speed and distance has many practical uses in the everyday world. people can use these calculations in sports for example to see how fast a baseball is thrown when traveling or to see the distance they traveled while driving. the formula for speed is distance divided by time. the formula for distance

4 easy ways to find velocity (with pictures) - wikihow

how to calculate velocity. velocity is an object's speed in a particular direction. example 1: a car traveling due east starts at position x = 5 meters. after 8 seconds the car is at position x = 41 meters. what was the car's displacement the car was displaced by (41m - 5m) = 36 meters east. calculate speed. references

3 ways to calculate speed - wikihow

how to calculate speed. speed is the measure of how fast something is going at a certain time. if you've ever looked at a car's speed gauge while it's moving you've seen speed being measured — the farther the needle goes the higher

5 simple ways to calculate average speed - wikihow

if you need to calculate average speed and you know the total distance covered and the total time it took to cover that distance divide the distance into the total time. if the fraction doesn’t simplify into a whole number convert it to a decimal. the result will be the average speed per unit of time usually an hour.

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