Percentage

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percentage

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In mathematics, a percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate percent of a number, divide the number by the whole and multiply by 100. Hence, the percentage means, a part per hundred. The word per cent means per 100. It is represented by the symbol “%”.

How Do We Find Percentage? The percentage can be found by dividing the value by the total value and then multiplying the result by 100. The formula used to calculate the percentage is: (value/total value)×100%.
How do you find 15% of $60?
Multiply 15 by 60 and divide both sides by 100. Hence, 15% of 60 is 9.
How do you solve 20% of 70?
Multiply 20 by 70 and divide both sides by 100. Hence, 20% of 70 is 14.
How do you solve 20% of 70?
Multiply 20 by 70 and divide both sides by 100. Hence, 20% of 70 is 14.

Example -1

A bakery had 252 customers last week.

The customers increased to 378 in this week.

To find:

Percentage of increase in customers.

Explanation:

From the question, we have

Percentage increase =

Example -2

An alloy contains 26 % of copper. What quantity of alloy is required to get 260 g of copper?

Solution:

Let the quantity of alloy required = m g

Then 26 % of m =260 g

⇒ 26/100 × m = 260 g

⇒ m = (260 × 100)/26 g

⇒ m = 26000/26 g

⇒ m = 1000 g

Examples of percentages are:

10% is equal to 1/10 fraction

20% is equivalent to ⅕ fraction

25% is equivalent to ¼ fraction

50% is equivalent to ½ fraction

75% is equivalent to ¾ fraction

90% is equivalent to 9/10 fraction

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