If I get this right you know the volume of sales for this year and know the percentage that it changed since last year and need to know the volume of last year?
First, you need to know what percent of last years volume that this years volume is, if not ...
let's say it increased by x% then this year the volume is 100+x% of last year or
if it decreased by x% then this years volume is (100-x)% of last year
Second,
volume this year = percentage change* last years volume
percentage means per 100 and "of" means multiply
so for example if this year the volume is 150 and it increased by 50%
then your percentage of last year is 150
150 = 150/100 * last years volume
150 = 1.5 * last years volume
150/1.5 = last years volume
100 = last years volume
Hope this helps..
(Final-Initial)/(Initial) is the formula for percent change (multiply by 100 to make it a percentage) I think this is what you are looking for.
100 %
Change in velocity / time
Subtract the previous year from the current year. Take that amount and divide by the previous year's amount. That will give you the percent. Example: Current assets 2010 550,000 2009 533,000 Increase of 17,000, percent increase is 3.2%
Using the equation of percent of change.(Original Value - Current Value) / Originalvalue *100% = Percent change(60 - 36 ) / 60 *100 = 40%40% is the percent change
just multiply for the current currency like right now its 13.9971
Power = Current * Voltage Power = Change in work/change in time
Rate of change of charge with time. its called current.
100*(New Length/Old Length - 1)
Percent change is the percent amount some value has changed. It has phenomenal usage in every day math and in fields such as business. It's often used to calculate the percent difference in sales between years for business.
Take the old value and subtract from the new value, then divide by the old value. Multiply by 100. That number representsthe percent change.
A stock broker uses percent of change. Almost any buisness might use it to calculate the money gained over a certain period of time.