Question

Write each of the following as percentage: 0.18

Answer 1

Hint: We can convert the given decimal into a fraction by multiplying the numerator and denominator by 100. Then we can multiply the fraction with$100\% $. On simplification, we get the required percentage.

Complete step by step solution: We have the decimal 0.18

Let, $x = 0.18$

We can multiply both numerator and denominator with 100.

$ \Rightarrow x = \dfrac{{0.18 \times 100}}{{100}}$

On multiplication, we get,

$ \Rightarrow x = \dfrac{{18}}{{100}}$

To obtain the percentage from a fraction, we need to can multiply the fraction with$100\% $.

$ \Rightarrow x = \dfrac{{18}}{{100}} \times 100\% $

On simplification, we get,

\[ \Rightarrow x = 18\% \]

Therefore the required percentage is $18 \% $

Note: Percent or per cent represents a fractional quantity in terms of how many parts in a hundred. It is a ratio which is expressed out of 100 and has unit or dimensions. We can say that $22\% $means 22 parts out of 100 parts. It is also equivalent to 0.22. The percentage is used to express the amount of change in quantities. It is also used to express the marks of the student. In everyday life, the concept of percentage is used for paying taxes. Each commodity has a fixed percentage which has to be paid as tax. Another use of percentage is when we buy things at some offer and then calculating its original price or reduced price.