# Ex.8.2 Q2 Compairing Quantities - NCERT Maths Class 7

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## Question

Convert the given decimal fractions to per cents.

a) \(0.065\)

(b) \(2.1\)

(c) \(0.02\)

(d) \(12.35\)

## Text Solution

**What is Known?**

Numbers in the decimal form.

**What is Unknown?**

Per cent form of the given numbers.

**Reasoning:**

First convert the decimal form into fractions and after that multiply the fraction with \(100\) to convert it into percentage.

**Steps:**

(a) \[\begin{align}&0.65 = \frac{{65}}{{100}}\\ &\frac{{65}}{{100}} \times 100 = 65\%\end{align}\]

(b) \[\begin{align}&2.1 = \frac{{21}}{{10}}\\ &\frac{{21}}{{10}} \times 100 = 210\%\end{align}\]

(c) \[\begin{align}&0.02 = \frac{2}{{100}}\\ &\frac{2}{{100}} \times 100 = 2\%\end{align}\]

(d) \[\begin{align}&12.35 = \frac{{1235}}{{100}}\\ &\frac{{1235}}{{100}} \times 100 = 1235 \%\end{align}\]