FutureStarr

9 Out of 10 Percentage

## 9 Out of 10 Percentage ## 9 Out of 10 Percentage

There’s no competing with the power of statistics. These 3. 2 million, million-dollar affirmations were enough to change their minds

### Change.

via GIPHY

You may also encounter ambiguity expressing percentage changes in a sentence. We can see this in action when discussing interest rates. Let’s assume the present interest rate was 2%. If the rate increased by 5%, what does this mean? Most laypeople will assume that it means it increased to 7%. However, it can also mean that it increased by 5% of 2%. This leads to the total of 2.01%, which is a lot less impressive.

); hence the net change is an overall decrease by x percent of x percent (the square of the original percent change when expressed as a decimal number). Thus, in the above example, after an increase and decrease of x = 10 percent, the final amount, \$198, was 10% of 10%, or 1%, less than the initial amount of \$200. The net change is the same for a decrease of x percent, followed by an increase of x percent; the final amount is p(1 - 0.01x)(1 + 0.01x) = p(1 − (0.01x) (Source: en.wikipedia.org)

### Percentage

via GIPHY

Percentages are sometimes better at expressing various quantities than decimal fractions in chemistry or physics. For example, it is much convenient to say that percentage concentration of a specific substance is 15.7% than that there are 18.66 grams of substance in 118.66 grams of solution (like in an example in percentage concentration calculator). Another example is efficiency (or its special case - Carnot efficiency). Is it better to say that a car engine works with an efficiency of 20% or that it produces an energy output of 0.2 kWh from the input energy of 1 kWh? What do you think? We are sure that you're already well aware that knowing how to get a percentage of a number is a valuable ability.

Let's go the other way around and try to find the numerator. Say we know that 70 percent of fruits in the basket are apples, and there are 30 fruits altogether. It could be worse - they could be lemons. So how many apples do we have? Let's get our percentage formula: (Source: www.omnicalculator.com)

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