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Basic Math/Percentage Increase



If something once sold for $0.25 and now sells for $1.00, is this an increase of 300% or 400%?

What is the difference?

I thank you for your reply.

To find the percent increase, take the current price and subtract the old price, then divide by the old price.  So,

1.00-.25 = .75
.75/.25 = 3 or 300%

Another way to look at it is, if it doubled in price (100% increase), it would be 50 cents, so 200% increase would be 75 cents and 1.00 is a 300% increase.  That's easy when the old and new price are multiples, however, if they're not, it's (new - old) divided by old

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Lynn Houston


I can answer questions in basic algebra and any grade school math.


Love math, currently helping my nephew get through Intermediate Algebra.

I majored in Math Ed in college (but decided not to teach), so have over 40 credits of math.

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