how do you calculate a percentage of a percentage?

Question

ex: year 1 - I sell 50% of my store's inventory for year 1, year 2 I sell 60% of my store's inventory for that year (year 2). I want to calculate % increase from year 1 to year 2 (Year over year) of my inventory sellthru. Normally I would just do (year 2# - year 1 #)/year 1 #

Answer 1

You can do the same thing with percentages, and obtain a (60-50)/50 = 20% increase in the percentage of inventory sold. However, the number you would get would not be very informative, unless the inventory is roughly the same in both years. For example, if your inventory in year 2 is significantly less, it would be easier to sell a greater percentage of it, and you could claim that your percentage sold increased, even though you actually sold less. On the other hand, if your inventory in year 2 is significantly greater, then your sales performance would actually be much better than this number would indicate, because that higher percentage would be harder to achieve.

Answer 2

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RE:
how do you calculate a percentage of a percentage?
ex: year 1 - I sell 50% of my store's inventory for year 1, year 2 I sell 60% of my store's inventory for that year (year 2). I want to calculate % increase from year 1 to year 2 (Year over year) of my inventory sellthru. Normally I would just do (year 2# - year 1 #)/year 1 #

Answer 3

Assuming you started with the same inventory each yr.
let x= initial inventory
1st yr you sold .5x
2nd yr you sold .6x
so
(.6x-.5x)/.5x=).6/.5)/.5=.1/.5=.2 or 20% increase

Answer 4

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to get 30 percent multiply 49.50 by 0.3 then subtract that from 49.50