what percentage of reduction is 15 to 45

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A volume was originally priced at $12.  It was put on sale for $8.  To the nearest percentage, by what percentage was its price marked down?

Correct answer:

Caption:

This problem is a uncomplicated percent chage problem.  The absoluge modify in price was .  Relative to the original price, it was , which is  or .

To encourage more sales, a store has lowered the cost of a item video game from $l to $xl. What is the percent toll subtract?

Correct reply:

%

Explanation:

To find the percent of change, you must divide the departure between the original and new amounts by the original corporeality. In this case, information technology would be , or , which is equivalent to twenty%.

In a boondocks, the population was 67,000. A disease epidemic strikes this town wiping 9,000 people out. What is the percent decrease of the population.

Possible Answers:

13.4%

v.vii%

viii.9%

13.2%

15.0%

Caption:

So the change in population is ix,000. The percentage of population loss is but the change in population divided by the original population.

Turn 0.134 into a percentage then that nosotros get xiii.iv%.  And so the percent of population loss is xiii.iv%.

A farmer began the growing flavor with 120 acres of wheat. A severe inundation recently devastated much of the region, and only 84 acres of wheat remain. By what per centum has the original amount of planted state (120 acres) decreased?

Explanation:

To find the per centum decrease, we need to calculate the deviation between the original (larger) amount of state and the concluding (smaller) amount. Here, this departure is acres. This value refers to theamount of decrease. We now need to convert it into a percentage.

To do and then, we use a proportion:.

Cross-multiplication shows us that  is equal to

, so percent.

The toll of a bicycle dropped from to.  Condone sales taxation.  What is the approximate per centum decrease?

Right answer:

Caption:

Write the formula to find percent subtract:

Subsitute the values into the formula.

The approximate percent subtract is.

In 1983 there were an estimated 6,000 snow leopards in the world, only now scientists believe there are only around 3,500. By what percentage has the snow leopard population declined since 1983? Circular your answer to the nearest tenth of a per centum.

Correct answer:

Explanation:

To figure out the percentage change, nosotros want to figure out the corporeality that the population changed. We can do this by subtracting:

Now we want to figure out what percentage that change was of the original. In other words, 2,500 is what percent of vi,000. We can write that equally a solvable equation knowing that "of" ways multiply:

 divide both sides past half-dozen,000

 multiply by 100 to convert this decimal into a percentage

A pair of shorts at the mall was marked down in price from  to . What was the sale pct on those shorts?

Correct answer:

Caption:

To find the percentage that the original toll decreased, utilise the following relation:

Now, to find the pct, simply multiply the decimal past 100.

Between Jan 2nd and Feb 15th, the number of Christmas trees in windows on Macalaster Lane decreased by . If  of the houses originally displayed trees, what percent of houses still have copse on February 15th?

Right answer:

Caption:

If the amount of houses decreased by 85%, that means the corporeality that remain is 100% - 85%, or 15%. We desire to find 15% of seventy%. Since nosotros're leaving our answer as a percentage, we can only leave seventy% as 70, and convert xv% to 0.xv and multiply:

.

This ways our answer is 10.5%.

In 2013, the population of a city was 390,113 people. The aforementioned city had a population of 501,662 people in 1999. By what per centum did the population of the city decrease during that time menses? Round to the nearest 10th of a percentage.

Right answer:

Explanation:

To figure out the percent change, nosotros want to effigy out the corporeality that the population inverse. We tin can practice this by subtracting:

Now we want to figure out what percent that change was of the original. In other words, 111,549 is what percent of 501,662. We tin can write that every bit a solvable equation knowing that "of" ways multiply:

dissever both sides past 501,662

multiply by 100 to convert this decimal into a percentage

What is the per centum subtract from to?

Correct answer:

Explanation:

To find the percentage change of two numbers, y'all use the formula:

.

This formula in the context of this question:

.

Thus, now know that if nosotros decrease near 40 vi pct of the original number from the original number, nosotros would get the second number. We have about a forty six percentage decrease.

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