Finding percent

Online Tutoring Is The Easiest, Most Cost-Effective Way For Students To Get The Help They Need Whenever They Need It.


Calculating the percentage is one of the basic and important operations in mathematics. Percentage means per hundred. The symbol used for percentage is given by ‘%’.  The whole quantity of any substance is the hundred percent (100%) of the whole substance. The fifty percent (50%) of the substance is half of the whole quantity. Similarly twenty five percent (25%) of the substance is one fourth of the whole quantity. Therefore the percentage signifies the portion of the given substance or quantity. A percentage can be converted to a fraction and vice-versa.
Example 1: Sam has 64 red and green pencils. If he has 16 red pencils find the percentage of green pencils he has?
Solution: The total number of the pencils Sam has = 64.
Number of red pencils = 16. (The remaining will be green)
Hence number of green pencils = 64 – 16 = 48.
The percent or the green pencils = number of green pencils/ Total number x 100.
The percent of green pencils = 48 /60 * 100 = 480/6 = 60 %.
Hence 60% of the pencils Sam has are green.
Question: Multiple choice question (Pick the correct option.)
What is the 20% of 720?
a)    720                 b) 20               c) 144             d) None of these.
Correct answer: option c.
The given number = 720.
The percentage of the number to be found = 20%.
The 20% can be written as 20/100.
The 20% of 720 further gives: 720 x 20/100 = 720/5 = 144.
Hence the answer is = 144.

HAVE A QUESTION? Chat With Our Tutoring Experts Now