# Calculate Rate of Change?

To calculate the rate of change in anything, simply divide the value you assign to the present condition by the value of the same thing in the past, and multiply the result by 100 to convert your answer to a percentage figure. The rate of change is sometimes called the growth rate. It is considered a useful tool in evaluating the growth or decline in populations or in areas. The rate of change data can also be used in evaluating other economic factors, such as employment.
Q&A Related to "Calculate Rate of Change?"
 Take the old value and subtract it from the new value, then divide by the old value. Multiply by 100. That number represents the percent change. http://answers.ask.com/Reference/Other/how_to_calc...
 1. Find the square root of the change in air velocity pressure. If the air velocity pressure changes by 0.4 inches of water: 0.4^0.5 = 0.2. 2. Multiply your answer by 4005 to convert http://www.ehow.com/how_7857840_calculate-air-mass...
 natural increase + net migration = population change. http://wiki.answers.com/Q/How_do_you_calculate_pop...
 The changes feed is quite efficient since it uses a pre-computed index. CouchDB maintains two indexes which are non-negotiable, one by key and one by sequence number. The _changes http://www.quora.com/CouchDB/CouchDB-BigCouch-How-...
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