Question

If \[72\% \] of \[25\] students are good in Hindi, how many are not good in Hindi?
A.\[16\]
B.\[14\]
C.\[18\]
D.\[7\]

Answer 1

Hint: First we know a percentage is a number or ratio expressed as a fraction of 100. It is denoted using the percent sign, \[\% \], although the abbreviations "pct.", "pct" and sometimes "pc" are also used. To find the percent of any number we need just multiple the percent with the number and then divided by \[100\].

Complete step-by-step answer:
Percentage is a relative value indicating hundredth parts of any quantity. In other words, the percentage which may also be referred to as percent is a fraction of a number out of \[100\]\[\% \]. Percentage means "per one hundred" and denotes a piece of a total amount.
We know that \[x\% \] of \[y\]\[ = \dfrac{x}{{100}} \times y\].
Given \[72\% \] of \[25\] students are good in Hindi
Then the number of students good in Hindi\[ = \dfrac{{72}}{{100}} \times 25 = 18\] students.
Therefore No. of students not good in hindi are $25-18 = 7$
So, the correct answer is “Option D”.

Note: Note that to find the percentage of a number when it is in decimal form, you just need to multiply the decimal number by \[100\]. For example, to convert \[0.5\] to a percentage, \[0.5 \times 100 = 50\% \]. The second case involves a fraction. If the given number is in fractional form, first convert it to a decimal value and multiply by \[100\].